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Effect of Anti-Fungal Agents on In Vitro Cultures of Eucalyptus grandis
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.P. Watt --- Department of Biology, South Africa B.A. Gauntlett --- Department of Biology, South Africa F.C. Blakeway --- Department of Biology, South AfricaYoung, small shoot explants of E. grandis were multiplied in the presence of 0,5 and 1 g/ℓ benomyl, 0,25 and 0,5 g/ℓ chlorothalonil, 0,36 and 0,72 g/ℓ propamocarb hydrochloride and 0,002 5 g/ℓ Amphotericin B. The multiplied shoots were then... -
Efficacy of fungicide seed dressings in the control of pre- and post-emergence damping-off and seedling blight of sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. Mc Laren --- , Republic of South Africa F. H.J. Rijkenberg --- , Republic of South AfricaA field trial to determine the efficacy of captab seed dressing in reducing the incidence of pre- and post-emergence damping-off and the severity of seedling blight of sorghum was carried out. Tests on four commercial sorghum hybrids showed this fungicide... -
Efficacy of systemic fungicides and timing of preventative sprays in the control of sugary disease of grain sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , Republic of South AfricaEight systemic fungicides, benomyl, bitertanol, carbendazim/flusilazol, CG169374, procymidone, propiconazole, terbuconazole and triadimenol, were evaluated in two separate field trials during the 1989/90 and 1990/91 seasons to determine their efficacy against the control of sugary disease of sorghum with a single... -
The economic benefits of fungicide treatment of maize for the control of grey leaf spot (Cercospora zeae-maydis) in KwaZulu-Natal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. M.J. Ward --- , Republic of South Africa M. A.G. Darroch --- Department of Agricultural Economics, Republic of South Africa M.D. Laing --- Department of Microbiology and Plant Pathology, Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South Africa H.M. Dicks --- Department of Statistics and Biometry, South AfricaGrey leaf spot (Cercospora zeae-maydis Tehon and E.Y. Daniels) is a relatively new disease of maize in South Africa and is capable of reducing grain yields by 20–60% in KwaZulu-Natal. Fungicides are widely used for control, but must be applied... -
Effect of zinc carrier on mobilisation of foliar-applied zinc above and below the point of application in ‘Kakamas’ peach seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa C. Schutte --- , Republic of South AfricaIn a pot trial using coarse sand as a potting medium and modified (low zinc) Hoagland solution as a nutrient source, single mid-shoot leaves of mildly zinc deficient ‘Kakamas’ peach seedlings were periodically dipped into aqueous solutions, prepared at 20... -
The impact of leaf rust on spring wheat in the winter rainfall region of South Africa
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 AfricaIn a field trial established near Malmesbury in the Western Cape during 1999 the effect of Puccinia triticina on yield and quality of the bread wheat (Triticum aestivum L.) cultivar SST 75 was determined. Information on the efficacy of different... -
Initial studies on fungicide evaluation for efficacy in the management of Fusarium head blight in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Ntushelo --- , Republic of South Africa W. H. P. Boshoff --- , Republic of South AfricaThe efficacy of the fungicides bromuconazole, carbendazim/epoxiconazole, carbendazim/flusilazole, carbendazim, cypro- conazole, flutriafol, prochloraz, propiconazole and tebucona- zole in controlling head blight was determined in the greenhouse. Wheat (Triticum aestivum L.) spikes of cultivar SST 38 were inoculated at the onset... -
Fungicide efficacy and the impact of stripe rust on spring and winter wheat in South Africa
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 Sciences, Republic of South Africa B.D. van Niekerk --- , Republic of South AfricaField trials were conducted from 1997 to 1999, in both the winter and summer rainfall areas of South Africa, to determine the effect of Puccinia striiformis Westend, f. sp. tritici Erikss. on yield and quality of bread wheat (Triticum aestivum... -
Efficacy of fungicides in the control of ergot (Claviceps africana) in sorghum (Sorghum bicolor) hybrid seed production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- ,Ergot is a disease of unfertilized sorghum ovaries. It is particularly prevalent in seed production where losses may average 10–20% per annum. Protection of the ovary during the critical period of flower opening to fertilization could reduce losses and increase,... -
The characterization of Pythium group G occurring on kenaf in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.T. Tesfaendrias --- Department of Plant Sciences, South Africa W.J. Swart --- Department of Plant Sciences, South Africa W. Botha --- , South AfricaKenaf provides a source of high quality cellulose fibers and its cultivation is being investigated in South Africa with a view to commercial production. In March 2001, kenaf plants in experimental plots near Bloemfontein, South Africa, developed large, black sunken... -
Fungicide sensitivity in Tapesia yallundae populations collected from 15 wheat fields in the Western Cape province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Ntushelo --- Department of Plant Pathology, Republic of South Africa P.W. Crous --- Department of Plant Pathology, Republic of South AfricaIn the Western Cape province of South Africa, eyespot disease (Tapesia yallundae) of wheat is primarily controlled by fungicide applications. Previous studies have shown, however, that isolates of T. yallundae vary in their response to fungicides. In the present study,... -
Survival and growth of Pinus patula at two years in response to harvest residue and pest management, in Mpumalanga, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Carol Rolando --- , Ross Allan --- ,Previous research has indicated that the presence of harvesting residues, post-planting tern perature and rainfall, and insect pests and diseases, are among the main causes of mortality during re-establishment of Pinus patula stands. The main objectives of this work were... -
Adoption of agrochemical management practices among smallholder cocoa farmers in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gideon Danso-Abbeam --- SAEES – Discipline of Agricultural Economics, South Africa Lloyd J. S. Baiyegunhi --- SAEES – Discipline of Agricultural Economics, South AfricaThis study explores smallholder cocoa farmers’ adoption decisions of agrochemical inputs in the Ghanaian cocoa industry using farm-level data collected from a sample of 838 farm households in four cocoa producing regions. Multivariate probit and Tobit models were used to... -
Integrated control of mango blossom malformation in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Magaritha H Schoeman --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa Ncobile B Zulu --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa F André Botha --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa Frikkie J Calitz --- Agricultural Research Council–Biometry, South AfricaMango malformation disease (MMD) is a serious disease worldwide, causing severe economic losses annually. In South Africa, recommendations for managing MMD are to break out malformed inflorescences when clearly visible. Despite these recommendations, high incidences of MMD were reported during... -
Colletotrichum gloeosporioides s.l. causes an outbreak of anthracnose of cacao in Ghana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: EK Asare --- , Ghana O Domfeh --- , Ghana SW Avicor --- , Ghana P Pobee --- , Ghana Y Bukari --- , Ghana I Amoako-Attah --- , GhanaOutbreak of anthracnose of cacao (Theobroma cacao L.), covering an estimated total growing area of 248.47 hectares, occurred in parts of Ghana from July to October 2019. Disease samples were collected from the outbreak areas to isolate and identify the... -
An evaluation of the environmental behaviour, fate and risk of key pesticides used in South African forest plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Noxolo Nokwethemba Ndlovu --- , South Africa Keith Little --- , South Africa Brenda Baillie --- , New Zealand Carol Rolando --- , New ZealandPesticides are important for the management of pests and diseases that have a negative impact on the sustainability of the forestry industry. Nevertheless, there is a trend to reduce pesticide use owing to the potential detrimental impacts they pose to... -
Foliar fungicides provide chemical control of Fusarium head blight of wheat in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Gerhardus J van Coller --- , South Africa Frederik J Kloppers --- , South Africa Vicky M Coetzee --- , South Africa Toinette van Rooyen --- , South Africa Lindy J Rose --- , South Africa Sandra C Lamprecht --- , South Africa Altus Viljoen --- , South AfricaChemical control of a yield-limiting, quality-reducing wheat disease like Fusarium head blight (FHB) is an important management strategy; however, no fungicides are registered against it in South Africa. The aim of this study was to determine foliar fungicides and seed... -
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... -
Triazole sensitivity among South African Puccinia graminis f. sp. tritici isolates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Isabella du Toit --- University of the Free State, South Africa Botma Visser --- University of the Free State, South Africa Lisa A Rothmann --- University of the Free State, South Africa Willem HP Boshoff --- University of the Free State, South AfricaFungicide applications are important in the successful production of winter cereals in South Africa (SA). While fungicide treatments are critical for crop protection, genetic selection and inheritance of fungicide resistance will lead to a decline in disease control. In this... -
Sublethal agrochemical residues in South African birds, 1969–2024
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Lorinda A Hart --- BirdLife South Africa, South Africa Linda van den Heever --- BirdLife South Africa, South Africa Jan-Dieter Ludwigs --- , GermanyAvian species serve as a barometer of ecosystem health and have been used to determine the presence of chemicals in the South African environment. We conducted a literature review to determine which sublethal agrochemical active ingredient residues have been tested...