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Reduced leaf diffusive resistance with re-exposure of maize (Zea mays L.) to atrazine
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. le Court de Billot --- Summer Grain Centre, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaApplication and subsequent removal of atrazine in a nutrient solution resulted in changes in leaf diffusive resistance in maize. Re-exposure to atrazine elicited lower responses in leaf diffusive resistance, suggesting an improved tolerance to atrazine by maize. The time elapsed... -
Canopy temperature as a plant water stress indicator for nectarines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Helga Tormann --- ,Three-year-old nectarine trees of the cultivar Independence grown in free-drainage lysimeters were exposed to a wet and a dry treatment, i.e. high soil moisture content throughout or progressive soil drying respectively. The canopy temperature of the trees was measured with... -
Die invloed van verdigtingspoging, klei-en waterinhoud op verdigting van geselekteerde Hoëveldgronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. A.G. Henning --- Departement van Landbou en Watervoorsiening, D.J. Nel --- Departement Bodemkunde, PU vir CHO, H. J. van M. Harmse --- Departement Bodemkunde, PU vir CHO,Die verwantskap tussen kegelpenetrasieweerstand en droë brutodigtheid word deur die mate van sortering beïnvloed. By swak sortering word laer penetrasieweerstande as in die geval van matige sortering met spesifieke brutodigthede geassosieer. Waterinhoud waarby maksimum verdigting plaasvind, word deur klei-inhoud en... -
An evaluation of rootstocks for apricots on sandy soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Stadler --- , Republic of South Africa P. J.C. Stassen --- , Republic of South AfricaThe nematode-resistant rootstocks Okinawa and Nemaguard yielded better than all other rootstocks for Royal on sandy soil. Bulida performed best on apricot seedling rootstock followed by Okinawa. Prunus mume did not appear promising for either Royal or Bulida. Both Royal... -
Leaf water retention of excised leaves as a measure of drought resistance in grain sorghum (Sorghum bicolor L. Moench) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa W.J. van den Berg --- , Republic of South AfricaThe objective of these experiments was to evaluate the usefulness of the excised leaf water retention capability (ELWRC) technique for screening grain sorghum genotypes for drought resistance. Seven genotypes were planted in a randomized block consisting of four replications. The... -
Changes in plant water relations of wheat and soybeans after relief of water stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sue Walker --- Department Land, Air and Water Resources, Veihmeyer Hall, U.S.A. D.M. Oosterhuis --- Department of Agronomy, U.S.A. Judy Eastham --- , Republic of South AfricaThe ability of a crop to recover from a mild or severe water stress and the rate of recovery are of importance for irrigation management and are also linked to the drought resistance and water use efficiency of the crop... -
Stomatal resistance measurement as an indicator of water deficit stress in wheat and soybeans
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.M. Oosterhuis --- Department of Agronomy, U.S.A. Sue Walker --- Department Land, Air and Water Resources, Veihmeyer Hall, U.S.A.The usefulness of stomatal response as an indicator of the onset and development of water stress was studied over five seasons in field-grown wheat (Triticum aestivum L.) and soybeans (Glycine max L. Merr.). With the onset of water stress, stomatal... -
Penetration resistance of fine sandy apedal soils as affected by relative bulk density, water content and texture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. T.P. Bennie --- Department of Soil Science, Republic of South Africa R. du T. Burger --- Department of Soil Science, Republic of South AfricaThe major physical properties that control the penetration resistance of soils are the degree of soil compaction, water content and particle size distribution. Sandy soils with well-sorted particle size distributions and low cohesivity compact and consolidate easily under pressure. Six... -
Changes in percentage moisture loss of excised leaves of seven field-grown grain sorghum genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa W.J. van den Berg --- , Republic of South AfricaThe objectives of these experiments were to study the seasonal and diurnal changes in percentage moisture loss (PML) and correlated characteristics of excised leaves. Seven grain sorghum genotypes were planted in a randomized block design and their PML and the... -
The inheritance of percentage moisture loss in sorghum leaves
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe inheritance of drought resistance and agronomic characteristics of field-grown sorghum plants was determined. High heritabilities were recorded for each characteristic. The genetic differences of percentage moisture loss were due to genes exhibiting incomplete dominance. The agronomic characteristics of plant... -
Relationships between yield, base temperature and drought resistance in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe object of this study was to investigate the interrelationship between yield, its components, base temperature and drought resistance of grain sorghum. Seven commercial cultivars and 27 F1 progenies were compared in two separate randomized block trials. A total of... -
Field reactions of lucerne genotypes to anthracnose and crown rot caused by Colletotrichum trifolii
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: SusanH. Koch --- Department of Plant Pathology, Republic of South Africa P.S. Knox-Davies --- Department of Plant Pathology, Republic of South AfricaNineteen different cultivars and experimental lines of lucerne (Medicago sativa L.) were inoculated with sand-bran cultures of Colletotrichum trifolii Bain & Essary and evaluated for resistance to anthracnose and crown rot under local conditions. The various genotypes differed significantly in... -
The resistance of guar (Cyamopsis tetragonoloba (L.) Taub.) to attack by the root parasitic Alectra vogelii (Benth.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Visser --- Department of Botany, Republic of South Africa B. Beck --- , Republic of South AfricaThe nature of the resistance of guar to attack by the root parasitic A. vogelii was investigated, it was found that although seed of the parasite was induced to germinate in the presence of stimulants, radicle elongation was prevented owing... -
Resistance of South African maize hybrids to maize streak virus
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G. D.J. van Rensburg --- , Republic of South Africa J.H. Giliomee --- Department of Entomology and Nematology, Republic of South Africa K.L. Pringle --- Department of Entomology and Nematology, Republic of South AfricaData from maize cultivar trials at Vaalharts over a five-year period were used to evaluate the level of resistance to maize streak virus (MSV) in commercial maize hybrids, and to determine the potential value of such resistance. Maize hybrids presently... -
Registration of cotton (Gossypium hirsutum L.) cultivars Letaba, NIK2 and OR19
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. van Heerden --- , Republic of South Africa W.H. van Staden --- , Republic of South Africa G.W. Schoeman --- , Republic of South Africa M.E. Stone --- , Republic of South Africa G. S.P. Vink --- , Republic of South AfricaLetaba, NIK2 and OR19 were released for commercial cultivation in the R.S.A. in 1989. Letaba has potential as a dryland cultivar in the Springbok Flats and northern Natal. NIK2 is intended for cultivation under irrigation in the same areas and... -
The inheritance of drought resistance characteristics in grain sorghum seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaA factorial crossing method was used to study the inheritance of and the relationship between characteristics which are related to drought resistance in grain sorghum seedlings. The potential for improving drought resistance in grain sorghum seedlings was verified by the... -
Die invloed van verskillende waterregimes op Up-to-date aartappels I. Vegetatiewe ontwikkeling, fotosintesetempo en stomatadiffusieweerstand
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. Steyn --- , Republiek van Suid-Afrika H.F. du Plessis --- , Republiek van Suid-Afrika P.F. Nortjé --- , Republiek van Suid-AfrikaDrie grondwaterregimes (20, 50 en 70% onttrekking van plantbeskikbare water) is gedurende herfsaanplan- tings in 1987 en 1988 op Up-to-date aartappels toegepas om die invloed daarvan op groei en ontwikkeling te ondersoek. Twee fisiologiese parameters van plantwaterstremming, naamlik, fotosintesetempo en... -
Inheritance of antibiosis to the maize stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae) and the combining ability for yield in resistant maize genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa H.O. Gevers --- Summer Grain Sub-centre, Republic of South AfricaA diallel set of hybrids involving eleven maize inbred lines was used to determine the genetic basis of resistance to Busseola fusca. Larval mass gain over a period of three weeks after the artificial infestation of plants was closely correlated... -
Implications of Chalara elegans resistance in groundnut breeding
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. J.A. van der Merwe --- Oil and Protein Seed Centre, Republic of South Africa L.P. van der Merwe --- Oil and Protein Seed Centre, Republic of South Africa H. L.N. Joubert --- Oil and Protein Seed Centre, Republic of South AfricaGenetic advances in six important traits in the groundnut, including resistance to C. elegans, were determined in field trials conducted at the Vaalharts Research Station during 1988/89 using a randomized block design. Results indicated that significant genetic advances for the... -
Status of resistance to Chilo partellus (Lepidoptera: Pyralidae) in South African grain sorghum hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- Summer Grain Centre, Republic of South Africa J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa M.C. van der Westhuizen --- Department of Zoology and Entomology, Republic of South AfricaThe level of resistance to Chilo partellus was evaluated in 49 commercially available grain sorghum hybrids using artificial infestation in each of two field trials. The assessment of leaf feeding damage on a scale of one to nine indicated levels... -
Absence of the 1BL/1RS chromosome translocation in the Kavkaz-derived wheat cultivar Tugela
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa G.F. Marais --- department of Genetics, Republic of South Africa J. Smith --- Small Grain Centre, Republic of South Africa J. le Roux --- Small Grain Centre, Republic of South Africa F.J. Kloppers --- Department of Plant Pathology, Republic of South AfricaThe South African bread wheat (Triticum aestivumL) cultivar Tugela (Kavkaz/Jaral'S') is highly resistant to stem rust caused by Puccinia graminis Pers. f. sp. tritici Eriks. & Henn. Based on pedigree analysis and infection types, it has previously been assumed that... -
Managing certain recently named Lr genes in breeding wheat for resistance to Puccinia recondita f. sp. tritici in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa B.D. van Niekerk --- Department of Plant Pathology, Republic of South Africa F.J. Kloppers --- Department of Plant Pathology, Republic of South Africa A.L. Vorster --- Department of Plant Pathology, Republic of South AfricaFive new or locally unexploited Lr genes were evaluated as sources of resistance to leaf rust (Puccinia recon- dita Rob. ex Desm. f. sp. tritici) of wheat (Triticum aestivum L.) in South Africa. The expression of Lr36, Lr41 and Lr42,... -
Field evaluation of leaf rust severity, yield loss and quality characteristics in near-isogenic wheat lines with Lr29, Lr35 or Lr37
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.J. Kloppers --- Department of Plant Pathology, Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa D. van Lill --- Small Grain Centre, Republic of South AfricaThe potential of three Lr genes in the wheat lines RL6080 (Thatcher*6/Lr29), RL6081 (Thatcher*8/Lr37) and RL6082 (Thatcher*6/Lr35) was evaluated in field experiments. Leaf rust reaction types on flag leaves of lines with Lr29, Lr35 or Lr37 varied between resistance and... -
The effects of tillage systems on soil bulk density and penetrometer resistance of a sandy clay loam soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.T. Steyn --- Small Grain Centre, Republic of South Africa J. P.C. Tolmay --- Small Grain Centre, Republic of South Africa J.J. Human --- Department of Agronomy, Republic of South Africa W.H. Kilian --- Small Grain Centre, Republic of South AfricaConcern has been expressed that reduced tillage systems may lead to excessive soil compaction, with a negative impact on crop growth. The objectives of this study were to determine the effects of different tillage systems, namely, minimum tillage (disc and... -
New sources of resistance to the stalk borers Busseola fusca (Fuller) and Chilo partellus Swinhoe in maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa J. van den Berg --- Summer Grain Centre, Republic of South AfricaA number of maize genotypes reportedly resistant to various stem borer species were evaluated for resistance to the maize stalk borer, Busseola fusca, and the spotted stem borer, Chilo partellus. Based on larval mass gain after two weeks of feeding... -
Fotosintesetempo en stomatadiffusieweerstand van aartappels soos beïnvloed deur waterstremming
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.F. du Plessis --- , Republiek van Suid-Afrika J.M. Steyn --- , Republiek van Suid-AfrikaDie invloed van waterstremming in aartappelplante op netto fotosintesetempo en stomatadiffusieweerstand is tydens 'n herfsaanplanting ondersoek. Watertoediening is op 14, 28 en 42 dae na opkom gestaak om sodoende verskillende waterstremmingsperiodes tydens die groeiseisoen toe te pas. Hierdie Studie is... -
Plant resistance × environment interaction: Perspectives on yield losses caused by the maize stalk borer, Busseola fusca (Fuller)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , Republic of South AfricaExperimental maize hybrids with various levels of resistance to the maize stalk borer, Busseola fusca (Fuller), were evaluated at different infestation levels during seasons of favourable and unfavourable rainfall. Limited plant resistance sufficed to reduce plant damage and yield losses... -
Assessment of macroscopic components of leaf rust resistance in wheat genotypes containing Lr12 and Lr13
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.M. Bender --- Department of Plant Pathology, South Africa Z.A. Pretorius --- Department of Plant Pathology, South Africa J.J. Spies --- Department of Botany and Genetics, South AfricaMonogenic resistance in wheat (Triticum aestivum L.) to leaf rust, caused by Puccinia recondita Rob. ex. Desm. f. sp. tritici, has generally not been durable. Durable resistance, as well as an improved expression of resistance, have been associated with Lr... -
The influence of Demeton-S-Methyl/Parathion and Imidacloprid on the yield and quality of Russian wheat aphid resistant and susceptible wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VickiL. Tolmay --- , South Africa D. van Lill --- , South Africa MarieF. Smith --- , South AfricaRussian wheat aphid, (Diuraphis noxia) causes severe damage to wheat in South Africa and producers have been forced to use insecticides for control. Plant resistance to Russian wheat aphid has been successfully transferred into bread wheat cultivars. A split plot... -
Evaluation of plant resistance to the maize stalk borer, Busseola fusca (Fuller) in maize germplasm improved for resistance to other borer species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J van Rensburg --- , Republic of South AfricaNineteen maize genotypes resistant to various stalk borer species were evaluated for resistance to the maize stalk borer, Busseola fusca (Fuller), using artificially infested plants grown in a greenhouse. The inbred line GT-FAWCC (C5) resistant to the fall armyworm Spodoptera... -
Lolium spp. resistance to ACC-ase inhibitors in wheat (Triticum aestivum L.) within the RSA: a preliminary study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Smit --- , Republic of South Africa B.L. De Villiers --- , Republic of South AfricaHerbicide resistance raises the possibility that the agricultural industry and crop producers might loose a valuable chemical tool that is essential for the control of weeds in wheat (Triticum aestivum L.) production. The recognition of herbicide resistance occurred relatively recently... -
The combining ability of RTx432 for Sorghum malt quality and stem borer resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa J. van den Berg --- , Republic of South Africa M. Bloem --- , Republic of South AfricaCombining ability of R-lines with respect to malt quality and stem borer resistance was evaluated in two trials. Crosses between three R-lines and eight R-lines were made for malt quality and three R-lines and seven R-lines for stem borer resistance... -
Biology of Cicadulina leafhoppers and epidemiology of maize streak virus disease in West Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: NilsaA. Bosque-Pérez --- Department of Plant, Soil and Entomological Sciences, USA I.W. Buddenhagen --- Department of Agronomy and Range Science, USAStudies have been conducted in Nigeria on biology of Cicadulina leafhopper vectors of maize streak virus (MSV), the role of indigenous grasses as reservoirs of virus and vectors, and on incidence and severity of MSV in relation to maize varietal... -
Criteria for selecting groundout varieties in breeding for resistance to rosette disease
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. J.A. van der Merwe --- , Malawi L.J. Reddy --- , India P. Subrahmanyam --- , India R.A. Naidu --- , IndiaShort-duration groundnut cultivars were screened under high, medium and low rosette disease pressures and evaluated for rosette disease incidence, presence of groundnut rosette assister virus and other agronomic characteristics. Heritabili- ties of these characteristics and interaction plus variance components across... -
Historical overview of breeding for durable resistance to maize streak virus for tropical Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I.W. Buddenhagen --- Department of Agronomy and Range Science, USA NilsaA. Bosque-Perez --- Department of Plant, USAMaize streak virus (MSV) was first studied by Storey in Kenya in the 1920s and resistance transferred into East African maize in the 1960's. Yet the majority of farmers of East Africa are still growing streak-susceptible maize. At the International... -
Inheritance of resistance to Russian wheat aphid, Diuraphis noxia (Homoptera: Aphididae) in two wheat lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vicki Tolmay --- , Republic of South Africa C.S. van Deventer --- , Republic of South Africa M.C. van der Westhuizen --- , Republic of South AfricaThe Russian wheat aphid, Diuraphis noxia, is a serious pest of wheat grown in the summer rainfall regions of South Africa. The use of D. noxia resistant cultivars may reduce the impact of this pest on cereal production, at the... -
Differential efficacy of tralkoxydim and diclofop-methyl on a suspected resistant ryegrass (Lolium rigidum Gaud.) biotype
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Smit --- , Republic of South Africa H.A. Smit --- , Republic of South Africa B.L. de Villiers --- , Republic of South AfricaThe efficacy of herbicides belonging to the aryloxyphenoxy propionic acids and cyclohexanedione groups was determined on a suspected resistant ryegrass biotype (Lolium rigidum Gaud.). Ryegrass seed was collected in the Southern Cape and germinated in a glasshouse with a day/night... -
Agronomic evaluation of streak resistant maize germ plasm derived from the improved Vaalharts maize composite
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , Republic of South AfricaStreak resistant maize inbred lines released by the Grain Crops Institute in 1995 were evaluated in the absence of streak disease as hybrid combinations in field trials. The evaluation of single crosses between three lines in each of a B73... -
Resistance of little seeded canary grass (Phalaris minor Retz.) to ACC-ase inhibitors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Smit --- , Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaSince 1996, several incidents of poor weed control regarding little seeded canary grass (Phalaris minor Retz.) in wheat (Triticum aestivum L.) production have been reported from the Western Cape. Little seeded canary grass showed indications of resistance towards ACC-ase inhibitors... -
Differential susceptibility of commercial zucchini cultivars to viruses of cucurbits
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.R. Cradock --- , Republic of South Africa J.V. da Graça --- , Republic of South Africa M.D. Laing --- , Republic of South AfricaA study to assess the effectiveness of some zucchini [Cucurbita pepo (L.)] cultivars in limiting the effects of virus disease in zucchini crops was conducted at Bayne's Drift, KwaZulu-Natal. The severity of disease was assessed using a visual rating scale... -
Antixenosis to Cicadulina mbila (Naudé) (Homoptera: Cicadellidae) as a mechanism of resistance to maize streak disease
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , South AfricaStreak resistant maize inbred lines derived from various resistance breeding programmes were compared for leafhopper feeding preferences, both in the presence and absence of a susceptible line. Pronounced antixenosis to C. mbila was observed in inbred lines E739 and CML206,... -
An evaluation of three Sr27-carrying wheat × rye translocations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- Department of Genetics, Republic of South AfricaNear isogenic lines differing for the presence or absence of group 3 wheat x rye translocations were developed in three wheat varieties. These included a non-compensating 3AS.3RS translocation and two compensating translocations with constitutions 3AL.3RS and 3BL.3RS. Results of a... -
Resistance in South African and foreign wheat cultivars to pathotypes 6E16A- and 6E22A- of Puccinia striiformis f. sp. tritici
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. H.P. Boshoff --- , Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa B.D. van Niekerk --- , Republic of South AfricaStripe rust, caused by Puccinia striiformis Westend. f. sp. tritici Eriks., has become an endemic disease of wheat (Triticum aestivum L.) in South Africa after being observed for the first time near Moorreesburg, Western Cape, during August 1996. The reaction... -
Evaluation of sorghum hybrids for resistance to the root rot complex
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , South AfricaSeventy-one sorghum hybrids were evaluated for root rot resistance at Bethlehem and Potchefstroom, South Africa, from 1995/96 to 1998/99. Mean root rot severity ranged from 30.3% in PAN8494 to 41.3% in PAN8061 and root rot severity of hybrids differed significantly... -
Reaction of South African spring wheat cultivars to head blight caused by Fusarium graminearum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Ntushelo --- , South Africa W. H. P. Boshoff --- , South AfricaHead blight caused by Fusarium graminearum (Schwabe) is an important wheat (Triticum aestivum L.) disease in the centrepivot irrigation areas of South Africa. Fifteen cultivars, Gamtoos, Inia, Kariega, Marico, Nantes, Palmiet, SST 38, SST 55, SST 57, SST 65, SST... -
Partial resistance to Puccinia triticina in certain Triticum species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.E. Snyman --- Department of Plant Pathology, South Africa Z.A. Pretorius --- Department of Plant Pathology, South Africa F.J. Kloppers --- , South Africa C.M. Bender --- Department of Plant Pathology, South AfricaResistance to rust diseases of common wheat (Triticum aestivum) has often been transferred from related species. These alien genes usually mediate hypersensitive, and frequently non-durable, resistance to leaf rust caused by Puccinia triticina. Partial resistance may be more durable than... -
Status of resistance of sorghum hybrids to the aphid, Melanaphis sacchari (Zehntner) (Homoptera: Aphididae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , South AfricaFour field trials were conducted over four seasons during the period from 1996/97 to 2000/2001 to determine the status of resistance of South African sorghum hybrids to natural infestation by the aphid Melanaphis sacchari. Aphid damage symptoms were evaluated on... -
Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 1. Evaluation of selection criteria
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- Department of Plant Breeding, South AfricaThe objective of this study was to provide a better understanding of the interrelationship between methods of screening for resistance to ear rot, caused by Stenocarpella maydis. The inheritance of resistance as well as genetic and phenotypic correlation of various... -
Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 2. Inheritance of resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- , South AfricaThe inheritance of resistance to ear rot, caused by Stenocarpella maydis, was investigated using a complete diallel cross of 10 inbred lines, ranging from resistant to susceptible. Parents, F1 crosses and reciprocals were evaluated at each of three localities, representative... -
Inheritance of resistance in maize to the African stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.M. André --- Department of Plant Breeding, South Africa J. B.J. van Rensburg --- , South Africa M.T. Labuschagne --- Department of Plant Breeding, South AfricaThe inheritance of resistance to the African stem borer, Busseola fusca, in maize was investigated by means of line x tester analyses in the F1 to F4 generations of crosses between 18 susceptible inbred lines and two resistant testers of... -
New generation maize inbred lines resistant to diplodia ear rot, caused by Stenocarpella maydis (Berk) Sutton
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J van Rensburg --- , South Africa J.D. Rossouw --- , South Africa C.S. van Deventer --- Department of Plant Sciences, South AfricaIn an attempt to obtain superior levels of resistance to Stenocarpella maydis ear rot, three elite maize inbred lines (DO620Y, E739 and B37) from different genetic backgrounds that had previously been shown to have useful levels of resistance were crossed... -
Recurrent selection for resistance in maize to the African stalk borer, Busseola fusca (Fuller)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , South Africa J. Klopper --- , South AfricaStem borer resistant inbred lines Mp704 and Mp706 of Mississippi origin were used as donor parents in a recurrent selection programme, to develop locally adapted germplasm with improved resistance to the stalk borer Busseola fusca. The segregating progenies of crosses... -
Inheritance of resistance to Uromyces appendiculatus in the South African dry bean cultivar Kranskop
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Liebenberg --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaThe inheritance of resistance to race RSA-Ua7 of the rust pathogen Uromyces appendiculatus in the South African dry bean (Phaseolus vulgaris) cultivar Kranskop, as well as the relationship of rust resistance between Kranskop and the international rust differential cultivars Redlands... -
Breeding for rust resistance increases dry bean productivity in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Liebenberg --- , South Africa A.J. Liebenberg --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaInfection of dry beans (Phaseolus vulgaris L.) by rust, caused by Uromyces appendiculatus Pers.: Pers. (Unger), results in regular yield and quality losses in South Africa. The growing of resistant varieties is generally considered the most cost effective control measure... -
New streak resistant maize lines derived from the Vaalharts composite
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J van Rensburg --- , South AfricaExperimental white and yellow maize inbred lines of US Corn Belt derivation were improved for streak resistance using the improved Vaalharts Composite in yellow kernel colour (VHC2) and its counterpart in white (VHCW) as donor parents. Using natural infection and... -
Yield retention of resistant wheat cultivars, severely infested with Russian wheat aphid, Diuraphis noxia (Kurdjumov), in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VickiL. Tolmay --- , South Africa CS van Deventer --- Department of Plant Breeding, South AfricaRussian wheat aphid, Diuraphis noxia (Kurdjumov), has been a serious pest of wheat in South Africa since 1978. Wheat producers observed that resistant cultivars, developed for control of this aphid, differed in resistance and questioned whether insecticide treatment would be... -
Effects of Artemisia afra leaf extracts on seed germination of selected crop and weed species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. Ammann --- Department of Agronomy, Republic of South Africa P.J. Pieterse --- Department of Agronomy, Republic of South AfricaHerbicide resistance in weeds is a phenomenon threatening sustainable cereal production in the winter rainfall region of South Africa. Every possible weed control measure that may be used to complement chemical weed control measures should be investigated. The effect of... -
Gene action determining Phaeosphaeria leaf spot disease resistance in experimental maize hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Derera --- , Republic of South Africa P. Tongoona --- , Republic of South Africa B.S. Vivek --- , Zimbabwe N. van Rij --- KwaZulu-Natal Department of Agriculture and Environmental Affairs, Republic of South Africa M.D. Laing --- , Republic of South AfricaPhaeosphaeria leaf spot (Phaeosphaeria maydis Henn.) has the potential to cause substantial yield losses in maize. Maize is grown by small-scale farmers without fungicides; hence there is need to breed for resistance in regionally adapted germplasm. Little information about the... -
First report of field resistance by the stem borer, Busseola fusca (Fuller) to Bt-transgenic maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , South AfricaReports of severe damage caused by the African stem borer, Busseola fusca (Fuller) to Mon810-transgenic maize (Bt) prompted a study in which the survival of progenies of diapause larvae collected from both a Bt and non-Bt planting were compared when... -
Herbicide resistance in weeds – a threat to effective chemical weed control in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- Department of Agronomy,Apart from the last 40 to 50 years, weed control in crops has always been a labour-intensive and time-consuming mechanical practice. Relief came in the form of chemical compounds that could control weeds, in particular selective herbicides. The development of... -
Host suitability of selected South African maize genotypes to the root-knot nematode species Meloidogyne incognita race 2 and Meloidogyne javanica: A preliminary study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.L. Ngobeni --- , South Africa H. Fourie --- , South Africa A.H. Mc Donald --- , South Africa P.W. Mashela --- , South AfricaThirty-one commercial maize (Zea mays L.) hybrids and open-pollinated varieties (OPV’s) were screened in separate greenhouse trials with a resistant inbred line MP712W as reference genotype for host suitability to Mel-oidogyne incognita race 2 and Meloidogyne javanica. Approximately 10 000... -
Involvement of reactive oxygen species generating enzymes and hydrogen peroxide in the rust resistance response of sunflower (Helianthus annuus L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Mohase --- Department of Plant Sciences, South Africa A.J. der Westhuizen --- Department of Plant Sciences, South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaActivities of potential reactive oxygen species generating enzymes and the subsequent production of H2O2, were investigated during the rust (Puccinia helianthi)—sunflower interaction using resistant (PhRR3) and susceptible (S37–388) lines. The resistance response was associated with induced activities of NADPH oxidase... -
Field evaluation of maize inbred lines for resistance to Exserohilum turcicum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Craven --- , South Africa A.P. Fourie --- , South AfricaNine maize inbred lines with excellent grey leaf spot resistance and good combining ability were evaluated for their reaction to infection by Exserohilum turcicum. The lines were compared to a differential set consisting of Oh43 and B73 (susceptible controls) and... -
Hypersensitivity of rust resistance in lentil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: TG Negussie --- Ethiopian Institute of Agricultural Research, Ethiopia CM Bender --- Department of Plant Sciences, South Africa PWJ van Wyk --- Centre for Microscopy, South Africa ZA Pretorius --- Department of Plant Sciences, South AfricaCharacterising resistance at different levels of expression is important in understanding host defence mechanisms and the improvement of durable disease resistance in crop plants. Histological reactions of the lentil cultivars EL-142 (susceptible) and Gudo (resistant) to infection by Uromyces viciae-fabae,... -
Effect of tillage systems and nitrogen application rates on selected physical and biological properties of a clay loam soil in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: TS Taylor --- Soil Science, School of Environmental Sciences, South Africa LW Titshall --- Soil Science, School of Environmental Sciences, South Africa JC Hughes --- Soil Science, School of Environmental Sciences, South Africa GR Thibaud --- Soil and Analytical Services Division, Department of Agriculture, South AfricaThe effects of agricultural management practices on soil physical and biological parameters provide fundamental information for assessing sustainability. Tillage (annual conventional tillage and no-till) and nitrogen fertiliser (limestone ammonium nitrate at rates of 0, 100 and 200 kg N ha−1)... -
Glasshouse screening of CIMMYT wheat germplasm for Fusarium head blight response in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Catharina I de Villiers --- Agricultural Research Council–Small Grain Institute, South AfricaFusarium head blight (FHB), mainly caused by Fusarium graminearum, is a serious disease of wheat, barley, oat and maize. Yield losses up to 40% have been reported and grain may contain mycotoxins that are harmful to humans and animals. In... -
Growth performance of lesser-known Leucaena species/provenances at Gairo inland plateau, Morogoro, Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: E. Edward S.A.O. Chamshama A.G. MugashaGrowth performance and psyllid resistance was studied among nineteen lesser-known Leucaena species/provenances at Gairo inland plateau, Morogoro, Tanzania. Assessment was done at irregular intervals for survival, root collar diameter and diameter at 30 cm above the ground, height, diameter at... -
Treatment adherence following national antiretroviral rollout in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: AltaC. Van Dyk --- Department of Psychology, South AfricaThe national antiretroviral (ARV) programme in South Africa commenced in 2004. ARV drugs became readily available to all South Africans due to the concerted efforts of ‘access to all’ campaigns. This study investigates medication adherence among a sample of South... -
Antibiotic resistance among heterotrophic bacteria in Lagos Lagoon, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OA Agwu --- Department of Biological Oceanography, NigeriaAntibiotic-resistant bacteria in the aquatic environment are considered reservoirs for drug-resistant genes. Therefore, culturable heterotrophic bacteria isolated from Lagos Lagoon surface waters between 2011 and 2012 were screened for their susceptibility to 14 commonly used antibiotics belonging to six major... -
Preliminary evaluation of guava selections for guava wilt disease resistance in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maritha H Schoeman --- Agricultural Research Council–Institute for Tropical and Subtropical Crops, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South AfricaGuava wilt disease (GWD), caused by Nalanthamala psidii, is a serious disease occurring in the guava-producing areas of the Mpumalanga and Limpopo provinces of South Africa. Two resistant guava rootstocks, TS-G1 and ‘TS-G2’, were developed by the ARC-ITSC in 1995... -
Insulin resistance induced by antiretroviral drugs: Current understanding of molecular mechanisms
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: WIW Ismail --- Division of Chemical Pathology, Department of Clinical Laboratory Sciences, JA King --- Division of Chemical Pathology, Department of Clinical Laboratory Sciences, TS Pillay --- Division of Chemical Pathology, Department of Clinical Laboratory Sciences,The increase in incidence of HIV infection continues to be a major public health problem across the world, but more especially in sub-Saharan Africa. Treatment with highly active antiretroviral therapy (HAART) has improved the prognosis of patients with AIDS, but... -
Serum resistin levels in nonalcoholic fatty liver disease and their relationship to severity of liver disease
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Murad --- Department of Internal Medicine, Faculty of Medicine, Egypt H Hassan --- Department of Chemical Pathology, Faculty of Medicine, Egypt H Husein --- Department of Chemical Pathology, Faculty of Medicine, Egypt A Ayad --- Department of Surgery, Faculty of Medicine, EgyptBackground: Resistin is a hormone that is linked to the development of insulin resistance (IR), but information on the direct relationship of resistin levels in humans with nonalcoholic fatty liver disease (NAFLD), and their effect on the histological severity of... -
A survey of metabolic syndrome in first-degree relatives (fathers) of patients with polycystic ovarian syndrome
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M Akbarzadeh --- Academic Instructor, Iran F Moradi --- Midwife, University of Medical Sciences, Iran MH Dabbaghmanesh --- Department of Internal Medicine, Endocrine and Metabolism Research Center, Iran P Jafari --- Department of Biostatistics, Iran ME Parsanezhad --- Department of Obstetrics and Gynecology, IranObjectives: Women with polycystic ovarian syndrome (PCOS) are at twice the risk of developing metabolic syndrome, compared to women from the general population. The aim of this study was to assess the prevalence of metabolic syndrome in the first-degree relatives... -
Ethical Issues in Family Practice: Are we prudent when using antimicrobials?
Item type: Journal Article • Journal: South African Family Practice • Authors: D Knapp van Bogaert --- Dept. of Family Medicine & Primary Health Care, GA Ogunbanjo --- Department of Family Medicine & Primary Health Care, -
Strategies for the Prevention and Containment of Antibiotic Resistance
Item type: Journal Article • Journal: South African Family Practice • Authors: SY Essack --- School of Pharmacy and Pharmacology, University of Kwazulu-Natal,Antibiotic resistance may emerge by antibiotic selection pressure but is perpetuated by diverse risk factors and maintained within environments as a result of poor infection control. Population-specific drug pharmacokinetics and pharmacodynamics also play a role. The WHO, US, UK and... -
Revisiting the importance of childhood activity
Item type: Journal Article • Journal: South African Family Practice • Authors: DC Janse van Rensburg --- Section Sports Medicine, PC Zondi --- Section Sports Medicine, TC Grant --- Section Sports Medicine, CC Grant --- Section Sports Medicine,Formalised exercise programmes for children and adolescents are becoming increasingly important. There has been a drastic increase in documented childhood morbidity and mortality relating to poor nutrition and low activity levels in recent years. Regular physical activity decreases the risk... -
The drama(s) of Independence Day: reflections on political affects and aesthetics in Kinshasa (2010)
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Katrien Pype --- Institute of Anthropological Research in Africa, Faculty of Social Sciences—University of Leuven, BelgiumOn June 30 2010, in Kinshasa, a “drama” unfolded as the military march was abruptly interrupted by street children intermingling and enacting ndombolo-inspired dances in front of the president. Police and soldiers started beating up people; the state radio and... -
Acanthosis nigricans: a flag for insulin resistance
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Venkatswami --- Department of Dermatology, India S Anandam --- Department of Dermatology, IndiaObjectives: Acanthosis nigricans refers to the velvety, black hyperpigmentation seen in the flexures. It is a cutaneous marker for insulin resistance (IR), some metabolic disorders and rarely malignancy. When secondary to IR, it is asymptomatic, except for the hyperpigmentation. The... -
Influence of glyphosate, other herbicides and genetically modified herbicide-resistant crops on soil microbiota: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Karen Wolmarans --- Department of Plant Sciences, South Africa Wijnand J Swart --- Department of Plant Sciences, South AfricaThe use of herbicides and genetically modified crops that are herbicide tolerant (HT) is said to adversely affect soil microbial biodiversity, thus negatively influencing the soil ecosystem. Concern has also been raised regarding the potential increase in crop disease incidence... -
Applied disease screening and selection program for resistance to vascular wilt in Hawaiian Acacia koa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nicklos S Dudley --- Hawai'i Agriculture Research Center, USA Tyler C Jones --- Hawai'i Agriculture Research Center, USA Robert L James --- Plant Disease Consulting Northwest, USA Richard A Sniezko --- United States Department of Agriculture Forest Service, USA Phil Cannon --- United States Department of Agriculture, USA Dulal Borthakur --- University of Hawai'i at Manoa, USAAcacia koa is a valuable tree species economically, ecologically and culturally in Hawai'i. A vascular wilt disease of A. koa resulting from infection by the fungal pathogen Fusarium oxysporum f. sp. koae (FOXY) causes high rates of mortality in field... -
Evaluating the inheritance of Ceratocystis acaciivora symptom expression in a diverse Acacia mangium breeding population
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jeremy Brawner --- Forest Industries Research Centre, Australia Yani Japarudin --- Sabah Softwood Berhad, Malaysia Mahadir Lapammu --- Sabah Softwood Berhad, Malaysia Redzuan Rauf --- Sabah Softwood Berhad, Malaysia David Boden --- Boden and Associates Pty Ltd, Australia Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute, South AfricaA dramatic rise in the incidence of a serious canker and wilt disease of Acacia mangium has led to the replacement of thousands of hectares of plantation forests in eastern Sabah. A disease screening program was initiated to evaluate levels... -
The prevalence and clinical significance of acanthosis nigricans in diabetic and non-diabetic women of mixed ancestry
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M Hoffmann --- Faculty of Medicine and Health Sciences, Division of Chemical Pathology, South Africa WI Visser --- Faculty of Medicine and Health Sciences, Department of Medicine, Division of Dermatology, South Africa B Ascott-Evans --- Faculty of Medicine and Health Sciences, Department of Medicine, Division of Endocrinology, South Africa FS Hough --- Faculty of Medicine and Health Sciences, Department of Medicine, Division of Endocrinology, South AfricaObjectives: The purpose of this study was to improve our understanding of the prevalence of acanthosis nigricans (AN) and its clinical relevance in our mixed-ancestry population and to investigate its association with abnormal glucose metabolism, obesity and hypertension. -
The evaluation of development projects. A South African anthropological perspective
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: RD Coertze --- Centre for Indigenous Law, South AfricaThe need to equate development with a process of self-directed westernisation in the present time is explained initially in this discussion. This is followed by a discussion on the involvement of the Ethnological Section of the former Department of Development... -
The drama(s) of Independence Day: reflections on political affects and aesthetics in Kinshasa (2010)
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Katrien Pype --- Institute of Anthropological Research in Africa, BelgiumOn June 30 2010, in Kinshasa, a “drama” unfolded as the military march was abruptly interrupted by street children intermingling and enacting ndombolo-inspired dances in front of the president. Police and soldiers started beating up people; the state radio and... -
The art of prescribing trastuzumab for HER2-positive breast cancer
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: K Outhoff --- Senior Lecturer, Department of Pharmacology,The human epidermal growth factor receptor 2 (HER2) is overexpressed in HER2-positive breast cancer. This confers characteristics associated with an overall poor prognosis, with early metastases to major visceral sites and a relative resistance to chemotherapy. Trastuzumab is a humanised... -
Transvaginal colour Doppler ultrasound in predicting response to chemoradiation in patients with carcinoma of the cervix
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Mishu Mangla --- SMS Medical College, India Deepak Singla --- Department of Anaesthesia,Background: The objective of the study was to evaluate the potential role of transvaginal colour Doppler ultrasound (TVCDUS) in predicting response to chemoradiotherapy in patients with locally advanced cervical cancer. -
Antimicrobial Susceptibility Patterns of Selected Bacteraemic Isolates from South African Public Sector Hospitals, 2010
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: C Bamford --- National Health Laboratory Service (NHLS), Groote Schuur and University of Cape Town, K Bonorchis --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, A Ryan --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, J Simpson --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, E Elliott --- National Health Laboratory Service (NHLS), Universitas and University of the Free State, R Hoffmann --- National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, P Naicker --- National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, N Ismail --- National Health Laboratory Service (NHLS), Steve Biko Academic and University of Pretoria, N Mbelle --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, M Nchabeleng --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, T Nana --- National Health Laboratory Service (NHLS), Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, C Sriruttan --- National Health Laboratory Service (NHLS), Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, S Seetharam --- National Health Laboratory Service (NHLS), Chris Hani Baragwanath and University of the Witwatersrand, J Wadula --- National Health Laboratory Service (NHLS), Chris Hani Baragwanath and University of the Witwatersrand,We report on antimicrobial susceptibility surveillance data for six key bloodstream pathogens (Escherichia coli, Klebsiella pneumoniae, Enterobacter spp., Pseudomonas aeruginosa, Acinetobacter baumannii and Staphylococcus aureus) identified in public sector hospitals in South Africa during 2010. Major findings include the accelerated... -
Antimicrobial susceptibility patterns of Escherichia coli strains isolated from urine samples in South Africa from 2007-2011
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Colleen Bamford --- National Health Laboratory Service (NHLS), Groote Schuur and University of Cape Town, Kim Bonorchis --- Medical Technology Microbiology Laboratory Manager, National Health Laboratory Service (NHLS), Green Point and University of Cape Town, Anthea Ryan --- Medical Technology Microbiology Laboratory Manager, National Health Laboratory Service (NHLS), Green Point and University of Cape Town, Rena Hoffmann --- Registrar Medical Microbiology, National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, Preneshni Naicker --- Registrar Medical Microbiology, National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, Motlatji Maloba --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, Trusha Nana --- National Health Laboratory Service (NHLS) Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, I. Zietsman --- Ampath Laboratories, C. Govind --- Lancet Laboratories, DurbanEscherichia coli is the most common cause of urinary tract infections. Knowledge of its local antimicrobial susceptibility patterns can be used to inform choice of empiric antimicrobial therapy. In this article, we review data on antimicrobial susceptibility patterns of E... -
Public knowledge, attitudes and behaviour towards antibiotic usage in Windhoek, Namibia
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Dawn D Pereko --- School of Pharmacy, South Africa Martie S Lubbe --- School of Pharmacy, South Africa Sabiha Y Essack --- School of Health Sciences, South AfricaBackground: The development of antibiotic resistance is a globally recognised human health threat. Overuse of antibiotics is a major contributory factor to the development of resistance. As end users, the public play a role in antibiotic use and the development... -
An observational study of infuenza A(H1N1)pdm09 viral shedding and resistance under standard-duration oseltamivir treatment
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: S Aspinall --- Synexus Clinical Research SA (Pty) Ltd, B Pretorius --- Synexus Clinical Research SA (Pty) Ltd, T Vally --- Synexus Clinical Research SA (Pty) Ltd, B Sebopa --- Synexus Clinical Research SA (Pty) Ltd, C Turner-Babb --- Lancet Molecular Pathology Laboratory,An observational study was established in South Africa in 2009, early in the infuenza A(H1N1)pdm09 outbreak, to provide information on the virological response of the new virus to oseltamivir and the potential for resistance. Patients (n = 54) aged 1-64... -
Saliva fractions from South African Russian wheat aphid biotypes induce differential defence responses in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lintle Mohase --- Department of Plant Sciences, South Africa Bernice Taiwe --- Glen Agricultural College, South AfricaThe Russian wheat aphid (RWA), Diuraphis noxia (Kurdjomov, 1913), is a notorious pest that reduces yield in wheat. Nevertheless, the source of eliciting activity during RWA–wheat interaction has not been established. This paper reports on the isolation of eliciting activity... -
Effects of a fast-burning spring fire on the ground-dwelling spider assemblages (Arachnida: Araneae) in a central South African grassland habitat
Item type: Journal Article • Journal: African Zoology • Authors: Charles R Haddad --- Department of Zoology and Entomology, South Africa Stefan H Foord --- Department of Zoology, Chair in Biodiversity Value and Change, South Africa René Fourie --- Department of Zoology and Entomology, South Africa Anna S Dippenaar-Schoeman --- Biosystematics: Arachnology, Agricultural Research Council–Plant Protection Research Institute, South AfricaFire is widely used as a management strategy in grasslands to maintain vegetation structure and improve grazing quality for large herbivores. The impacts of burning on invertebrates in South Africa remain poorly understood. A study was initiated in spring 2005... -
The Shockley five-parameter model of a solar cell: A short note
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H.A. Koffi --- Department of Physics, Ghana A. Kuditcher --- Department of Physics, Ghana V.C.K. Kakane --- Department of Physics, Ghana E.A. Armah --- Department of Physics, Ghana A.A. Yankson --- Department of Physics, Ghana J.K.A. Amuzu --- Department of Physics, GhanaThis paper is concerned with an alternative formulation of the Shockley five-parameter model of a solar cell. This formulation leads to an explicit relationship between the short-circuit current and the light-generated current and the direct determination of the light-generated current... -
Estimating rotor resistance of wound rotor induction motor by look-up table and fuzzy logic approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chitra Venugopal --- Department of Electrical Engineering, School of Engineering, South AfricaWound rotor induction motors are commonly used in high torque, adjustable speed industrial applications. The provision to add external resistances to the rotor offers high starting torque and smooth starting at a low starting current. In this paper, the look-up... -
First outbreak of vancomycin-resistant Enterococcus in a haematology unit in Durban, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Yesholata Mahabeer --- Department of Medical Microbiology, South Africa Warren Lowman --- Vermaak and Partners Pathologists, South Africa Chetna N Govind --- School of Laboratory Medicine and Medical Sciences, South Africa Khine Swe-Swe-Han --- Department of Medical Microbiology, South Africa Koleka P Mlisana --- Department of Medical Microbiology, South AfricaVancomycin resistant enterococci (VRE) are increasingly important causes of morbidity and mortality in developed countries. Although VRE is a significant cause of nosocomial sepsis in these countries, limited data is available on the role that this pathogen plays in South... -
Family versus individual plant selection for stem borer (Eldana saccharina) resistance in early stages of sugarcane breeding in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvellous Zhou --- South African Sugarcane Research Institute, South Africa Alfred Mokwele --- South African Sugarcane Research Institute, South AfricaEldana saccharina is an indigenous lepidopteran insect pest and the most damaging stem borer of sugarcane in southern Africa. Breeding for E. saccharina resistance in South Africa started in 1980 by crossing resistant parents (expected to possess resistance genes) and... -
The 2012 University of Cape Town Faculty of Health Sciences centenary debate
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Td Noakes --- University of Cape Town,Our human ancestors thrived on a diet high in fat and protein of animal or fish origin for at least 2.5 million years. Foods with a high-energy content and nutritional density were required for the development of the large, energy-expensive... -
Knowledge and perceptions of antimicrobial stewardship concepts among final year pharmacy students in pharmacy schools across South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Marisa Burger --- Department of Pharmacy, South Africa Jaco Fourie --- Department of Pharmacy, South Africa Devin Loots --- Department of Pharmacy, South Africa Tercia Mnisi --- Department of Pharmacy, South Africa Natalie Schellack --- Department of Pharmacy, South Africa Selente Bezuidenhout --- Department of Pharmacy, South Africa Johanna C Meyer --- Department of Pharmacy, South AfricaBackground: Antimicrobial stewardship is currently not mandatory as part of the undergraduate training of pharmacists. Identifying gaps in knowledge and a better understanding of pharmacy students’ perceptions about antimicrobial stewardship could assist in recommendations for appropriate changes to the pharmacy... -
Relationship between MPV and paraoxonase-1 activity, brachial artery diameter and IMT in patients with diabetes mellitus
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Pinar Karakaya --- Department of Endocrinology, Turkey Yildiz Okuturlar --- Department of Internal Medicine, Turkey Meral Mert --- Department of Endocrinology, Turkey Asuman Gedikbasi --- Department of Biochemistry, Turkey Filiz Islim --- Department of Radiology, Turkey Didem Acarer --- Department of Internal Medicine, Turkey Nursel Kocamaz --- Department of Internal Medicine, Turkey Ozlem Soyluk --- Department of Endocrinology, Turkey Teslime Ayaz --- Department of Internal Medicine, Turkey Pinar Alarslan --- Department of Endocrinology, Turkey Ozlem Harmankaya --- Department of Internal Medicine, Turkey Abdulbaki Kumbasar --- Department of Internal Medicine, TurkeyAims: Higher mean platelet volume (MPV) in diabetic patients has been considered as an emerging risk factor for diabetes related micro- and macrovascular complications. Human paraoxonase 1/arylesterase (PON1), which has antioxidant and antiatherogenic properties, is documented in high oxidative stress... -
Valuable Russian wheat aphid-resistant bread wheat accessions identified using four South African Diuraphis noxia biotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vicki L Tolmay --- Agricultural Research Council-Small Grain Institute, South Africa Mardé Booyse --- Agricultural Research Council Infruitec-Nietvoorbij, South AfricaResistance-breaking biotypes of Diuraphis noxia have been reported in both the USA and South Africa where commercial cultivars with genetic resistance to this pest have been deployed. The need to identify novel Russian wheat aphid (RWA) resistance for deployment against... -
Use of a chimeric transgene construct to confer broad resistance in zucchini (Cucurbita pepo L.) plants against cucurbit-infecting potyviruses occurring in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jacques D Ibaba --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Benice J Sivparsad --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Augustine Gubba --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaThe frequent identification of cucurbit-infecting viruses across the province of KwaZulu-Natal (KZN) in South Africa necessitates developing effective methods of controlling these diseases. Putative transgenic baby marrow (Cucurbita pepo L.) plants resistant to Zucchini yellow mosaic virus (ZYMV), Moroccan watermelon... -
Mechanisms of antibiotic resistance in Haemophilus parainfluenzae
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Regina E. Abotsi --- Antimicrobial Research Unit, School of Health Science, South Africa Usha Govinden --- Antimicrobial Research Unit, School of Health Science, South Africa Sabiha Y. Essack --- Antimicrobial Research Unit, School of Health Science, South AfricaHaemophilus parainfluenzae is part of the HACEK group of fastidious bacteria commonly implicated in endocarditis and bacteremia. Previously considered as a normal respiratory, oral and sometimes genitourinary commensal, it has been recognised as a pathogen that can cause life-threatening infections... -
Use of adjuvants and fungicide application timing for the control of wattle rust (Uromycladium acaciae) in Acacia mearnsii plantations in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Richard G Payn --- School of Natural Resource Management, South Africa Keith M Little --- School of Natural Resource Management, South AfricaAcacia mearnsii (black wattle) plantations in South African cover approximately 110 000 ha, with Uromycladium acaciae (wattle rust) found from Limpopo to the Western Cape of South Africa. This disease of black wattle causes reductions in growth, and mortalities with... -
Farm worker identities contested and reimagined: gender, race/ethnicity and nationality in the post-strike moment
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Åsa Eriksson --- Department of Ethnology, History of Religions and Gender Studies, SwedenIn 2012/2013, widespread rural unrest — commonly referred to as the “farm worker strike” — broke out in the Western Cape, South Africa. This exposed not only poor salaries and working conditions, but also the disparity between representations of farm... -
Assessment of genetic diversity of rice based on SNP markers for selection of parents for sheath rot (Sarocladium oryzae) resistance breeding
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Simon M Mvuyekure --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Julia Sibiya --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa John Derera --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa John Nzungize --- Rwanda Agriculture Board, Rwanda Germain Nkima --- Rwanda Agriculture Board, RwandaSheath rot of rice, caused by Sarocladium oryzae, is an important emerging rice disease not only in Rwanda, but also in other rice-growing countries. Given that cultivar resistance is a sustainable management strategy for small-scale farmers, the aim of this... -
Fluoroquinolone-resistant Salmonella typhi infection: a report of two cases in South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: N Schellack --- School of Pharmacy, South Africa E Bronkhorst --- School of Pharmacy, South Africa C Maluleka --- Department of Microbiology, South Africa L Hunt --- The Ohio State University Wexner Medical Center, USA P Srinivas --- The Ohio State University Wexner Medical Center, USA W Grootboom --- School of Pharmacy, South Africa D Goff --- The Ohio State University Wexner Medical Center, USA P Naicker --- School of Pharmacy, South Africa T Modau --- School of Pharmacy, South Africa O Babarinde --- School of Pharmacy, South AfricaTyphoid and paratyphoid fever are acute, life-threatening febrile illnesses caused by systemic infection with the bacterium Salmonella enterica. Nineteen cases were reported in South Africa in 2016. We report on two cases of bacteraemic invasive S. typhi with fluoroquinolone resistance. -
Molecular characterisation of multidrug-resistant Pseudomonas aeruginosa from a private hospital in Durban, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Cosmos B. Adjei --- Antimicrobial Research Unit, South Africa Usha Govinden --- Antimicrobial Research Unit, South Africa Krishnee Moodley --- Lancet Laboratories, South Africa Sabiha Y. Essack --- Antimicrobial Research Unit, South AfricaBackground: Multi-drug resistant Pseudomonas aeruginosa pose a clinical challenge globally. This study delineated the molecular mechanisms of resistance to β-lactam antibiotics in multidrug-resistant P. aeruginosa isolated from a single private hospital in Durban, South Africa and ascertained clonality with regard... -
Antimicrobial susceptibility of Mycoplasma genitalium isolates from Pretoria, South Africa in 2012 and 2016
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Marie C Le Roux --- Department of Microbiological Pathology, South Africa Maanda Mafunise --- Department of Microbiological Pathology, South Africa Barbara E de Villiers --- Department of Microbiological Pathology, South Africa Ramalau Mm Ditsele --- Department of Microbiological Pathology, South AfricaBackground: Mycoplasma genitalium is a sexually transmitted pathogen associated with non-gonococcal urethritis and cervicitis. Azithromycin regimens have been considered first-line treatment for M. genitalium infections, with fluoroquinolone regimens effective as second-line treatments. However, the proportion of M. genitalium harbouring macrolide... -
Detection of rust resistance in selected Zimbabwean and ICARDA bread wheat (Triticum aestivum) germplasm using conventional and molecular techniques
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Bruce Mutari --- Crop Breeding Institute, Zimbabwe Sripada M Udupa --- Biotechnology Section, International Center for Agricultural Research in the Dry Areas (ICARDA), Morocco Peter Mavindidze --- Department of Agronomy, South Africa Charles S Mutengwa --- Department of Agronomy, South AfricaHost resistance is the most effective and economical method to minimise yield losses caused by rusts. The aim of this study was to detect the presence of resistance in 75 wheat genotypes. The presence of the genes Sr2, Sr24, Lr34,... -
Adult plant resistance to leaf rust and stem rust of wheat in a newly developed recombinant inbred line population
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandiswa Figlan --- School of Agricultural, Earth and Environmental Sciences, South Africa Tarekegn G Terefe --- Agricultural Research Council–Small Grain Institute, South Africa Hussein Shimelis --- School of Agricultural, Earth and Environmental Sciences, South Africa Toi J Tsilo --- Agricultural Research Council–Small Grain Institute, South AfricaLeaf rust caused by Puccinia triticina and stem rust by P. graminis f. sp. tritici are the most destructive diseases of wheat (Triticum aestivum L.), resulting in substantial yield losses globally. A continuous search for new sources of effective rust... -
Antimicrobial resistance surveillance in the South African public sector
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Olga Perovic --- Centre for Healthcare-Associated Infections (HAIs), Husna Ismail --- Centre for Healthcare-Associated Infections (HAIs), Erika Van Schalkwyk --- Centre for Healthcare-Associated Infections (HAIs),Electronic surveillance for antimicrobial resistance was established in 2013 for public sector laboratories and released annually. This article reports susceptibility data on ESKAPE pathogens for 2016. -
Antimicrobial resistance surveillance in the South African private sector report for 2016
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Olga Perovic --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Husna Ismail --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Erika Van Schalkwyk --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Elizabeth Prentice --- Ampath Microbiology National Reference Laboratory, Marthinus Senekal --- Pathcare Pathology Group Reference Laboratory, Chetna N Govind --- Department of Clinical Microbiology, South AfricaAim: The relevance of surveillance for antimicrobial resistance is increasingly recognised in the light of a global action plan to combat resistance. This report presents antimicrobial susceptibility testing on ESKAPE pathogens from private sector laboratories in South Africa for 2016. -
Globalised tuberculosis control in local worlds
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Justin Dixon --- Department of Global Health and Development, United Kingdom Helen Macdonald --- School of African and Gender Studies, Anthropology and Linguistics, South AfricaDespite a steady global decline in the incidence of tuberculosis (TB), progress towards health targets has been slow and a crisis of drug-resistant strains of TB continues unabated. The United Nations high-level meeting on TB in September 2018 resulted in... -
An EnSpm interspersed repeat identified in Triticum aestivum and implicated in resistance to Diuraphis noxia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Anandi Bierman --- Division of Bioinformatics, South Africa Anna-Maria Botha --- Department of Genetics, South AfricaDiuraphis noxia Kurdjumov, 1913 (Hemiptera: Aphididae), commonly known as the Russian wheat aphid, is a devastating pest of wheat and barley. Although fourteen sources of resistance (Dn genes) have been identified to date, none have been cloned. In this study... -
An artificial inoculation protocol for Uromycladium acaciae, cause of a serious disease of Acacia mearnsii in southern Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Stuart Fraser --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Alistair R McTaggart --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Thobile Nxumalo --- Institute for Commercial Forestry Research, South Africa Louise S Shuey --- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Jolanda Roux --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South AfricaUromycladium acaciae is the cause of a severe wattle rust epidemic in plantations of Acacia mearnsii (black wattle) in southern Africa. Research on the biology of this damaging rust is assisting in the development of control strategies. One strategy under... -
Evaluation of the early warning indicators of HIV drug resistance surveillance system in Manicaland province, Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anesu Marume --- Department of Community Medicine, College of Health Sciences, Zimbabwe Admire Zikiti --- Department of Community Medicine, College of Health Sciences, Zimbabwe Byron Chapoterera --- Department of Community Medicine, College of Health Sciences, Zimbabwe Julita Maradzika --- Department of Community Medicine, College of Health Sciences, ZimbabweMore than 1.1 million people currently receive lifelong antiretroviral treatment in Zimbabwe following the adoption of the test and treat strategy in 2017. The huge numbers of people on antiretroviral therapy (ART), combined with HIV’s error-prone replication, increases the probability... -
Dry bean cultivars with the potential for use in potato–dry bean crop rotation systems for managing root-knot nematodes in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kgabo M Pofu --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa Phatu W Mashela --- Green Biotechnologies Research Centre, South Africa Sonja L Venter --- Agricultural Research Council–Vegetable and Ornamental Plants, South AfricaPotato (Solanum tuberosum) cultivars are highly susceptible to the root-knot (Meloidogyne spp.) nematodes, with the preferred nematode management strategy being rotation using nematode-resistant crops. Most commercial potato- producing farmers prefer high-yielding, but low-input leguminous crops for use in potato crop-rotation... -
Lifestyle modification in the management of insulin resistance states in overweight/obesity: the role of exercise training
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Tshidi Thaane --- Discipline of Biokinetics, Exercise and Leisure Sciences, South Africa; Ayesha A Motala --- Department of Diabetes and Endocrinology, South Africa; Andrew J Mckune --- Discipline of Biokinetics, Exercise and Leisure Sciences, South Africa;Physical inactivity is a major contributor to overweight/obesity and associated disorders including cardiovascular diseases (CVDs), diabetes, and insulin resistance (IR). Intensive lifestyle modification (ILM) is recommended as first-line treatment for obese individuals at risk for IR. Exercise is considered to... -
Antimicrobial stewardship in rural districts of South Africa: growing a positive culture
Item type: Journal Article • Journal: South African Family Practice • Authors: Klaus B von Pressentin --- Mossel Bay Sub-district, Garden Route District, South Africa Hendré Swanepoel --- Van Rensburg Lancet, South Africa Jessica JS Opie --- Division of Haematology, National Health Laboratory Service, South Africa Louis S Jenkins --- Division of Family Medicine and Primary Care, South AfricaBackground: The success of medical specialist-led antimicrobial stewardship activities in urban tertiary health care settings has been well documented. The issue of antimicrobial resistance remains an ongoing concern. This has particular relevance in primary health care communities treated from sub-district... -
Pseudohypoparathyroidism presenting in children at a tertiary hospital in Johannesburg, South Africa
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: N Madi --- , FY Moosa --- , KB Parbhoo --- , JM Pettifor --- , K Thandrayen --- ,Pseudohypoparathyroidism (PHP) represents a group of disorders due to end organ resistance to the actions of parathyroid hormone (PTH) and abnormalities in the PTH signalling pathway. PHP is characterised by hypocalcaemia and hyperphosphataemia, with or without a variable expression of... -
Determination of the series resistance of a solar cell through its maximum power point
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H. A. Koffi --- , Accra, Ghana A. A. Yankson --- , Accra, Ghana A. F. Hughes --- , Accra, Ghana K. Ampomah-Benefo --- , Accra, Ghana J. K. A. Amuzu --- , Accra, GhanaA simple analytical approach has been developed to determine the series resistance, R s, of a solar cell. The method adopted here depends only on the knowledge of the open-circuit voltage, V oc, and the current and voltage at the... -
Acute effects of single-bout exercise in adults with type 2 diabetes: a systematic review of randomised controlled trials and controlled crossover trials
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Dominic Hicks --- , South Africa Robert C Hickner --- , South Africa Usha Govinden --- , South Africa Takshita Sookan --- , South AfricaBackground: Exercise interventions improve type 2 diabetes (T2D). Published randomised control trials and crossover control trials were systematically examined to establish the differences in the effect of single-bout exercise on glucose control and insulin sensitivity in individuals with type 2... -
Violence and HIV among female street sex workers in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Molefi Motsoeneng --- , South AfricaThis study explored South African female sex workers’ (FSWs) experiences of violence by their clients. Informants were eight FSWs aged from 25 to 30 years who obtained clients mainly from the streets and transportation depots of a major metropolitan city... -
First report of glyphosate and paraquat resistance in two Plantago biotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Frederick Eksteen --- , Ethel Phiri --- , South Africa Petrus J Pieterse --- , South AfricaResistance to glyphosate in plantago (Plantago lanceolata L.), a serious weed in South Africa, was confirmed in 2003. More recently, a plantago biotype that is putatively resistant to both glyphosate and paraquat was reported. Seeds from a putatively susceptible (S)... -
Response of improved Brachiaria (Urochloa) grass cultivars to foliar diseases and their agronomic performances in Rwanda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bellancile Uzayisenga --- , Kenya Mupenzi Mutimura --- , Rwanda James W Muthomi --- , Kenya Agnes W Mwang’ombe --- , Kenya Sita R Ghimire --- , KenyaDiseases have emerged as one of the major challenges of Brachiaria production in Africa. Nine Brachiaria cultivars were evaluated for leaf rust, leaf spot and leaf blight diseases and agronomic performances in two agro-ecological zones of Rwanda. The relationships between... -
Antiretroviral therapy adherence and viral suppression among HIV-infected adolescents and young adults at a tertiary hospital in Ghana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Isaac Justice Kobina Biney --- , Ghana Kofi Adesi Kyei --- , Ghana Vincent Jessey Ganu --- , Ghana Ernest Kenu --- , Ghana Peter Puplampu --- , Ghana Steven Manortey --- , Ghana Margaret Lartey --- , GhanaWith the introduction of antiretroviral therapy (ART), many HIV-infected children are growing into adolescence and adulthood. A facility-based cross-sectional study was conducted at the Fevers Unit of one of the teaching hospitals in Ghana. The Morisky Medication Adherence Scale (MMAS-8)... -
The feasibility of resistance in the workplace: A critical investigation
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: A. Benda Hofmeyr --- , South AfricaIn this article, I undertake a critical interrogation of the complex relations of control operating in the contemporary workplace of the knowledge worker by drawing on Foucault’s theorisation of power and resistance. I plot the risks to which the knowledge... -
Occurrence of putatively resistant plantago in the winter rainfall region of South Africa: a survey
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Ethel E Phiri --- , South Africa Frederik H Eksteen --- , Petrus J Pieterse --- , South AfricaGlobally glyphosate is the most widely used herbicide. The alternative in many cropping situations is paraquat. After many years of success, neither herbicide could control plantago (Plantago lanceolata L., also ‘English plantain’) in Robertson. A survey was carried out by... -
Location and seasonal effects on sugarcane smut and implications for resistance breeding in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM Zhou --- , South AfricaSmut, Sporisorium scitamineum (Syd.) (formerly Ustilago scitamineum), is a major disease of sugarcane causing cane yield losses of 0.25 to 0.75% for every 1% of infected stools. Breeding resistant cultivars is part of integrated smut management. The objective of this... -
Assessing resistance levels of potato cultivars in South Africa against Alternaria alternata
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Avhurengwi Shirley Mathelemuse --- , Kwasi Sackey Yobo --- , Mariette Truter --- , Philippus Steyn --- , Mapotso Anna Kena --- , Rene Sutherland --- ,Brown leaf spot caused by Alternaria alternata (Fries) Keissler is one of the most devastating fungal diseases of potato. Management of this disease relies mostly on fungicide applications. However, fungicides are becoming less effective due to the development of fungal... -
L'ascenseur et l'escalier — la lutte contre le SIDA au Cameroun
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jacques-Philippe Tsala Tsala --- Department of Psychology, University of Yaoundé I and Catholic University of Central Africa, CameroonHIV/AIDS infection has spread like wildfire in the countries of sub-saharan Africa. In order to fight that pandemic, Cameroon has organised itself by setting up, with the assistance of bilateral and multilateral partners, a national structure with the aim to... -
Stigma, identity and resistance among people living with HIV in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jane Goudge --- Centre for Health Policy, School of Public Health, University of the Witwatersrand, Lenore Manderson --- Faculty of Medicine, Nursing and Health Sciences, and Faculty of Arts, Monash University, Australia Bulelwa Ngoma --- Centre for Health Policy, Helen Schneider --- Centre for Health Policy and Professor Extraordinarius, University of the Free State,AIDS-related stigma can cause delays in testing, poor treatment adherence, and greater numbers of new infections. Existing studies from low- and middle-income countries focus on the negative experiences of stigma, and few document resistance strategies. In this article we document... -
An allele-specific PCR assay for detection of mutations that confer benzimidazole resistance and zoxamide sensitivity in Phyllosticta citricarpa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Beatrix Coetzee --- Stellenbosch University, South Africa Elma Carstens --- Citrus Research International (Pty) Ltd, South Africa Gerhardus C Schutte --- Avima (Pty) Ltd, South Africa Elaine Basson --- Citrus Research International (Pty) Ltd, South Africa Mia J Groeneveld --- Stellenbosch University, South Africa Tankiso Mpholo --- Land Reform and Rural Development, South Africa Providence Moyo --- Citrus Research International (Pty) Ltd, South Africa Jessica C Winn --- Stellenbosch University, South Africa Paul H Fourie --- Citrus Research International (Pty) Ltd, South Africa Aletta E Bester van der Merwe --- Stellenbosch University, South AfricaPhyllosticta citricarpa is the causative agent of citrus black spot (CBS), a cosmetic fungal disease that has been reported in most of the citrus-growing regions of the world. The occurrence of CBS in orchards is predominantly controlled by the application... -
“Sex is sex, marriage is marriage”: infidelity amongst married women in Shamva, Zimbabwe
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Patience Chadambuka --- Midlands State University, Zimbabwe André Pelser --- University of the Free State, South Africa Victor Muzvidziwa --- Midlands State University, ZimbabweMany African societies adhere to a strong patriarchal norm as regards sexual relations, one that is unforgiving of female infidelity yet tolerates men’s extramarital affairs and even incorporates these into culture. This study reveals that, contrary to traditional assumptions defining... -
A note on reducing resistance in snarks
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Imran Allie --- University of Cape Town,In this paper, we define new parameters which measure the edge uncolourability of cubic graphs. These parameters count the minimum number of vertex reductions required to render a 3-edge-colourable graph, given a cubic graph G. Two of these parameters we... -
Morphological and physiological responses of Calobota sericea plants subjected to water limitation and subsequent rewatering
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Lincoln Raitt --- University of the Western Cape, South Africa Lilburne Cyster --- University of the Western Cape, South Africa Samson Chimphango --- University of Cape Town, South Africa M Igshaan Samuels --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Clement Cupido --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa J Stephen Boatwright --- University of the Western Cape, South AfricaCalobota sericea is a native legume of South Africa, confined to the water-limited rangelands, and it has recently been prioritised for additional characterisation regarding its pasture potential. In this study, we examined the growth characteristics of C. sericea under glasshouse... -
How loneliness influences the city identity of Chinese migrant children: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yanmei Tang --- Nanjing Xiaozhuang University, China Hong Zhou --- Nanjing Xiaozhuang University, China Shuangzhou Chen --- The University of Hong Kong, ChinaThis study explored the mediating role of resilience and the moderating role of social class on the relationship between loneliness and migrant children’s city identity. The participants were 479 Chinese migrant children (females = 52%, mean age = 10.07 years,... -
Characterisation, prevalence and antibiogram of Aeromonas hydrophila in turtles: insights into virulence factors, antimicrobial resistance genes and innate immunity
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ahmed R. Khafagy --- Suez Canal University, Egypt Atef M. Kamel --- Suez Canal University, Egypt El-sayed N. Abou El Ghait --- National Institute of Oceanography and Fisheries (NIOF), Egypt Nermeen M. Mohamed --- Cairo University, Egypt Nada H. Eidaroos --- Suez Canal University, Egypt Fatma A. Hagag --- National Institute of Oceanography and Fisheries (NIOF), Egypt Mohamed Fathi --- National Institute of Oceanography and Fisheries (NIOF), EgyptBacterial infection poses a significant threat to the health and survival of turtles, both in their natural habitats and in captivity. Notably, the presence and interactions of bacteria, such as those belonging to the Aeromonas genus, have been identified for... -
Genetic, breeding and environmental parameters for yellow sugarcane aphid (Sipha flava) damage in advanced South African sugarcane breeding populations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvellous Zhou --- South African Sugarcane Research Institute, South AfricaYellow sugarcane aphid (YSA), a native pest of temperate and subtropical regions in North America, has spread to many regions of the world including KwaZulu-Natal and Mpumalanga sugarcane growing regions of South Africa. Cultivar differences to YSA damage have been... -
Advancing disease-resistant stock in aquaculture: a brief overview
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Nur Nashyiroh Izayati Mastor --- Borneo Marine Research Institute, Universiti Malaysia Sabah, Malaysia Wahidatul Husna Zuldin --- Borneo Marine Research Institute, Universiti Malaysia Sabah, Malaysia Norfazreena Mohd Faudzi --- Borneo Marine Research Institute, Universiti Malaysia Sabah, Malaysia Kenneth Francis Rodriques --- Higher Institution Centre of Excellence (HICoE), Borneo Marine Research Institute, Universiti Malaysia Sabah, Malaysia Julian Ransangan --- Borneo Marine Research Institute, Universiti Malaysia Sabah, MalaysiaThe effective management of diseases caused by aquatic pathogens is one of the primary challenges in aquaculture. The breeding of disease-resistant fish requires a combination of traditional and modern genetic approaches. With an increasing global population and demand for food,...
