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Evaluering van plantdoders vir langtermynbeheer van onkruid in aanplantings van knoffel (Allium sativum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.F. Nortjé --- , P.J. Henrico --- ,Van die ses plantdoders wat geëvalueer is, het slegs oksifluorfen bevredigende siesoenlange beheer van onkruide in aanplantings van knoffel (Allium sativum L.) verskaf. Oksadiason, chloroksuron, nitrofen, metabenstiasuron, ioksinil en oksifluorfen het min of geen fitotoksiese simptome op knoffel teen aanbevole... -
Use of chlorophyll a fluorescence in screening for herbicide susceptibility in several Nicotiana tabacum L. cultivars and breeding lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- Faculty of Natural Sciences, Department of Plant and Soil Sciences, Private Bag X6001, Republic of South Africa G. H.J. Krüger --- Faculty of Natural Sciences, Department of Plant and Soil Sciences, Private Bag X6001, Republic of South Africa C.R. Nolte --- , Republic of South AfricaPossible differential sensitivity of newly released tobacco cultivars to different herbicides must be determined, as possible unfavourable combinations could exist which may have large financial implications in terms of cultivars bred, herbicide and tobacco line combinations used, and concentrations in... -
Measuring water stress in Pinus patula Schiede ex Schlect. & Cham. seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.A. Rolando --- , K.M. Little --- ,A pot trial was conducted to investigate measures of water stress for Pinus patula seedlings planted for commercial forestry in South Africa. The objectives were to determine the efficacy of different equipment for quantifying water stress, and the effect of... -
Preliminary assessment of bambara groundnut (Vigna subterranea L.) landraces for temperature and water stress tolerance under field conditions in Botswana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Sesay --- Botswana College of Agriculture, Botswana T. Mpuisang --- Botswana College of Agriculture, Botswana T.S. Morake --- Department of Agricultural Research, Ministry of Agriculture, I. Al-Shareef --- School of Bioscience, Department of Plant and Crop Science, UK H.J. Chepete --- Botswana College of Agriculture, Botswana B. Moseki --- Department of Biological Sciences, BotswanaField experiments were conducted in 2006/07 and 2007/08 in Botswana to study the response of bambara groundnut to heat stress (2006/07 season) and to heat stress and soil moisture deficit stress (2007/08 season). In both seasons selected bambara groundnut landraces... -
Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO2–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Heyneke --- School of Environmental Science and Development, South Africa AJ Strauss --- School of Environmental Science and Development, South Africa RJ Strasser --- Bioenergetics Laboratory, Switzerland GHJ Krüger --- School of Environmental Science and Development, South AfricaSouth Africa has an extremely energy-intensive economy, resulting in substantial air pollution through its coal-fired power stations. Modelled sulphur dioxide (SO2) concentrations on the central Highveld mostly range between 10 and 50 ppb, exceeding 50 ppb in source areas. Well-watered... -
The effect of canola (Brassica napus) as a biofumigant on soil microbial communities and plant vitality: a pot study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Clarissa Potgieter --- North-West University, South Africa Misha De Beer --- North-West University, South Africa Sarina Claassens --- North-West University, South AfricaCanola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil functions is still unclear. A pot experiment with... -
Household water sources and their contribution towards fluoride consumption in Njoro Division, Nakuru District, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Wkn MoturiFluoride is regarded as an essential element for the formation of healthy bones and teeth. However, high fluoride levels in drinking water have been associated with high incidences of dental fluorosis. A 1996–1997 study in Njoro Division, Nakuru District, established... -
Ecophysiological responses of the salt marsh grass Spartina maritima to salinity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Naidoo --- School of Biological and Conservation Sciences, South Africa Y Naidoo --- School of Biological and Conservation Sciences, South Africa P Achar --- Department of Biological and Physical Sciences, USAThe effects of salinity on growth and productivity of Spartina maritima (Curtis) Fernald were investigated in glasshouse and field experiments in 2008. In the glasshouse study, plants were subjected to 2%, 10%, 20%, 40% and 80% sea water, with tidal... -
Acacia mearnsii sensitivity to the application of pre-emergent herbicides applied at planting
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: KeithM. Little --- , South AfricaFive pre-emergent herbicides were applied either on their own or in various combinations to commercially planted Acacia mearnsii De Wild. seedlings in the KwaZulu-Natal Midlands. Acacia mearnsii growth responses to the protected or unprotected application of these herbicides were compared... -
Using chlorophyll fluorescence to determine stress in Eucalyptus grandis seedlings
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Carol A. Rolando --- , Keith M. Little --- ,Since several environmental factors affect the functioning of the photosynthetic system, the status of the photosynthetic apparatus is a good indicator of the plant in terms of stress and stress adaptation. The measurement of chlorophyll fluorescence with a portable fluorimeter... -
Photosynthetic differences between Microcystis aeruginosa and Oscillatoria simplicissima in relation to species succession in the Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Venter --- School of Environmental Sciences and Development (Botany Division), S du Plessis --- School of Environmental Sciences and Development (Botany Division), PDR van Heerden --- School of Environmental Sciences and Development (Botany Division), AJ Strauss --- School of Environmental Sciences and Development (Botany Division), J Bezuidenhout --- School of Environmental Sciences and Development (Botany Division),In 1991 Oscillatoria simplicissima replaced Microcystis aeruginosa in the Vaal River, South Africa. This study explored the reason for this succession by looking at the photosynthetic performance of these two cyanoprokaryotes at different temperatures, light intensities and N:P ratios. Microcystis... -
Evaluation of a thin-layer chromatographic technique for identification of bush species browsed by goats
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: LV Mabinya JM BrandDiet selection by herbivores is a major determinant of animal and plant production and has a direct bearing on the sustainability of stock farming generally. Fistulated goats were confined in designated plots on the University of Fort Hare research farm... -
Innovative fluorescence detection technique for metals in cestode egg-shells
Item type: Journal Article • Journal: African Zoology • Authors: N. Degger --- Department of Zoology, South Africa A. Avenant-Oldewage --- Department of Zoology, South Africa R. Greenfield --- Department of Zoology, South AfricaRecent work in the field of parasitology has drawn attention to the application of parasites as pollution-accumulation indicators, particularly cestodes. A discrepancy in metal concentrations within cestode posterior and anterior tissue has led researchers to attribute this phenomenon to metals... -
A comparison of three techniques for fluorochrome marking of juvenile Clarias gariepinus otoliths
Item type: Journal Article • Journal: African Zoology • Authors: Reece Wartenberg --- Department of Ichthyology and Fisheries Science, South Africa Anthony J. Booth --- South African Institute for Aquatic Biodiversity, South Africa Olaf L. F. Weyl --- South African Institute for Aquatic Biodiversity, South AfricaIntramuscular injection of the antibiotic oxytetracycline (OTC) has been the only method previously employed for chemically marking C. gariepinus otoliths for ageing studies. This study compared intramuscular injection, immersion, and dietary incorporation methods of administering OTC to determine the most... -
Growth, physiology and yield responses of Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata to plant density under drip-irrigated commercial production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Innocent Maseko --- University of South Africa, South Africa Yacob G Beletse --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Noluyolo Nogemane --- University of South Africa, South Africa CP du Plooy --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaAmaranthus cruentus, Corchorus olitorius and Vigna unguiculata are traditional leafy vegetables with potential to improve nutritional security of vulnerable people. The promotion of these crops is partly hindered by the lack of agronomic information. The effect of plant spacing on... -
The meanings of Obama in K'ogello: Culture, ethno-politics and the making of leaders in multiparty Kenya
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Steve Ouma Akoth --- Department of Anthropology & Sociology, South AfricaThis article examines how different groups of Kenyans appropriated, publicised, and sought to harness the candidature and later the presidency of Barack Obama. On the one hand is the appropriation of Obama in the community of Luo ‘indigenes’ living in... -
Effects of short-term water deficit stress on physiological characteristics of Bambara groundnut (Vigna subterranea (L.) Verdc.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yusuf Y Muhammad --- School of Biosciences, Malaysia Sean Mayes --- Plant and Crop Sciences, School of Biosciences, UK Festo Massawe --- School of Biosciences, MalaysiaBambara groundnut (Vigna subterranea (L.) Verdc.) is an annual leguminous food crop native to Africa. The crop is grown in marginal soils and it is considered to be a drought-resistant species. However, there is limited information on the ways Bambara... -
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... -
Contrasting hydrography and phytoplankton distribution in the upper layers of cyclonic eddies in the Mozambique Basin and Mozambique Channel
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Lamont --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa RG Barlow --- Marine Research Institute and Department of Oceanography, South AfricaHydrographic data collected in cyclonic eddies in the Mozambique Channel and Basin revealed notable differences in temperature and salinity at a depth of 100 m, the upper mixed layer, the nitracline depths, and vertical distribution of chlorophyll-a (Chl-a). Differences in... -
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... -
Sex-specific grazing dynamics of the recently described copepod, Lovenula raynerae, in an ephemeral pond in the Eastern Cape province of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Department of Zoology and Entomology, South AfricaThis study investigated the temporal changes in the sex specific ingestion rates of the recently described calanoid copepod, Lovenula raynerae, which numerically and by biomass dominates the plankton community in ephemeral ponds in the Eastern Cape province of South Africa... -
Phenotypical, physiological and biochemical traits of the vegetative growth of wild tepary bean (Phaseolus acutifolius) under restricted water conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Reynaldo Leal-Delgado --- Botánica, Colegio de Postgraduados, México Cecilia B Peña-Valdivia --- Botánica, Colegio de Postgraduados, México Rodolfo García-Nava --- Botánica, Colegio de Postgraduados, México Antonio García-Esteva --- Botánica, Colegio de Postgraduados, México Eleazar Martínez-Barajas --- Departamento de Bioquímica, Facultad de Química, México Daniel Padilla-Chacón --- CONACyT – Colegio de Postgraduados, MéxicoTepary bean (Phaseolus acutifolius A. Gray) is distributed in arid and semi-arid regions from Arizona to the northern areas of Mexico. The objective of this study was to quantify the effects of water deficit on vegetative growth in four accessions... -
Chlorophyll a fluorescence as an indicator of heat stress in cotton (Gossypium hirsutum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM van der Westhuizen --- , South Africa DM Oosterhuis --- , USA JM Berner --- , South Africa N Boogaers --- , South AfricaCotton (Gossypium hirsutum L.) is a major fibre crop that is greatly affected by climatic factors, especially drought and high temperatures. Excessive temperature (above 30 °C) during the reproductive stage (flowering) negatively affects cotton yield potential. Four diverse cotton genotypes... -
World Wars and Trauma: Lake Victoria Basin Women Novelists’ Reflections
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Wafula Yenjela --- , KenyaThis article reads Kenyan novels that catalogue the trauma of the Luo veterans of World War I and II. The focus is on Grace Ogot’s The Promised Land (1966), Margaret Ogola’s The River and the Source (1994), Marjorie Macgoye’s The... -
Non-adherence to antiretroviral treatment among migrating fishermen in western Kenya’s islands: a rapid qualitative study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Stephen Okumu Ombere --- University of Pretoria, South Africa Erick Otieno Nyambedha --- Maseno University, KenyaFishing communities in many Sub-Saharan African countries are a high-risk population group disproportionately affected by the HIV epidemic. The association of migration with HIV and AIDS in sub-Saharan Africa is well documented. Frequent mobility, high consumption of alcohol, multiple sexual...