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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... -
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... -
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,... -
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,... -
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... -
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...