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A comparison of head infection and blight development caused by Fusarium graminearum and Fusarium crookwellense in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. H.P. Boshoff --- Department of Plant Pathology, Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa W.J. Swart --- Department of Plant Pathology, Republic of South AfricaThe objectives of this study were to compare the infection of wheat heads by Fusarium graminearum and F. crookwellense and to determine the effect of temperature on head blight development induced by these species. Scanning electron microscopy of spikes of... -
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... -
Effect of soil nutrient status on severity of seedling diseases and root rot of sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , Republic of South AfricaThe hybrid NK283 was subjected to a range of nutrient element concentrations to determine their effect on predisposition of sorghum to seedling diseases and root rot. Emergence was not affected by soil nutrient status. Similarly N, P and K did... -
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... -
Field evaluation of Ugandan sweetpotato germplasm for yield, dry matter and disease resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. Yada --- , Uganda P. Tukamuhabwa --- Department of Crop Science, Uganda A. Alajo --- , Uganda R.O.M. Mwanga --- , UgandaA total of 946 morphologically distinct accessions of sweet-potato (Ipomoea batatas [L.] Lam) germplasm collected from Uganda were evaluated along with four released cultivars for root yield, dry matter, sweetpotato virus disease (SPVD) and Alternaria bataticola blight disease resistance for... -
Quambalaria species: increasing threat to eucalypt plantations in Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: GS Pegg AJ Carnegie MJ Wingfield A DrenthSpotted gum (Corymbia citriodora subsp. variegata and C. maculata) is a valuable source of commercial timber and suitable for a wide range of different soil types in eastern Australia. The main biological constraint to further expansion of spotted gum plantations... -
Moringa (Moringa oleifera) leaf extracts inhibit spore germination of Alternaria solani, causal agent of early blight disease of tomato (Solanum lycopersicum)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Culver Mvumi --- Department of Plant Production and Soil Science, South Africa Elizabeth Ngadze --- Department of Crop Science, Zimbabwe Diana Marais --- Department of Plant Production and Soil Science, South Africa Elsa S du Toit --- Department of Plant Production and Soil Science, South Africa Brighton M Mvumi --- Department of Soil Science and Agricultural Engineering, ZimbabweAlternaria solani is highly infective and can sporulate on tomato at 13.2 × 106 spores mL−1. The fungicidal effect of Moringa oleifera leaf chloroform and aqueous extracts (MLCE and MLAE, respectively) was investigated in vitro to determine the inhibitory effect... -
Disease surveillance and farmers’ knowledge of Brachiaria (Syn. Urochloa) grass diseases 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 --- , KenyaBrachiaria (syn. Urochloa) is one of the most important tropical forages grass of African origin. Its performance is affected by different constraints, including diseases. This study assessed the distribution, incidence and severity of Brachiaria diseases and documented farmers’ knowledge on... -
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... -
Calonectria species diversity on eucalypts in Indonesia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marthin Tarigan --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Nam Q Pham --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Fahimeh Jami --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Leonardo SS Oliveira --- , Brazil Muhammad Agni Saha --- Asia Pacific Resources International Holdings Ltd (APRIL), Indonesia Alvaro Durán --- Asia Pacific Resources International Holdings Ltd (APRIL), Indonesia Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaDiseases increasingly threaten the rapidly expanding eucalypt plantation industry of Indonesia. Of these, leaf blight caused by Calonectria spp. is considered amongst the more important problems, causing losses both in production nurseries and plantations. Using DNA sequence data based on...