... Grey leaf spot of maize (GLS) Cercospora zeae-maydis. Grey leaf spot disease of maize (Cercospora zeaemaydis) has seriously decreased grain yields in the province of KwaZulu-Natal, South Africa, and has spread to infect maize in neighbouring provinces. Residue Management C. zeae-maydis cannot successfully survive in debris . ©CAB International. cause high losses. No commercial hybrids were identified to be resistant to grey leaf spot in the maize hybrid response to grey leaf spot trial. © Copyright 2020 CAB International. Epidemiology and management of gray leaf spot: A new disease of maize in South Africa. the plant will also be affected. leaf spot on maize. Grey leaf spot is a relatively new fungal disease of maize in South Africa. Cercospora species causing grey leaf spot at a partic-ular location. Use grey Ethiopia Share . © Copyright 2020 CAB International. Grey leaf spot of maize (GLS) Cercospora zeae-maydis. observe the weather to ensure that it will not rain until at least 6 hours Resistance of the tested maize genotypes to grey leaf spot can be expressed in terms of an additive-dominance model, with dominance almost complete. veins, this is streak virus and not leaf spot fungus. Diagnosis/Identification 17. Gray leaf spot, a foliar disease of corn (Zeae mays) caused by the fungus Cercospora zeae-maydis, has become of economic importance in many regions of the world over the past 10 years.Gray leaf spot was first described in the U.S.A. in 1925 on corn in Alexander County, IL. maydis Ellis and Everh., occurs on <75% smallholder maize (Zea mays L.) farms in East Africa, and … Ward and others published Gray leaf Spot: A Disease of Global Importance in Maize Production | Find, read and cite all the research you need on ResearchGate Show simple item record. Preventative management strategies can reduce econom-ic losses due to gray leaf spot. When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval. lower leaves of the maize plants and infects them. It is necessary to determine the distribution and aetiology of the disease across all the maize production agro-ecologies When the weather is good, the fungus begins to develop on residues Epidemiology and predictive management of gray leaf spot of maize . These treatments also suppressed sporulation of P. sorghi on diseased foliage. the disease is seen on the leaves. and produces a powdery substance. Abstract Grey leaf spot disease of maize caused by Cercospora zeae-maydis seriously decreased grain yields in the province of KwaZulu-Natal, South Africa, and spread to maize in neighbouring provinces. Grey leaf spot of maize, (Zea maydis L.) (Cercospora zeae-maydis) Tehon and Daniels, is one of the most destructive leaf diseases of maize. On the underside of the leaf CABI is a registered EU trademark. Gray leaf spot is one of the major constraints of maize production in Ethiopia where warm humid environmental condition is prevailing. Get PDF (5 MB) Abstract. The assessments were done by sampling 81 maize fields in 9 districts from 3 zones during 2017. The The causal organism associated with the disease is Cercospora zeae-maydis. A field experim.. Home. Management strategies for gray leaf spot include tillage, crop rotation and planting resistant hybrids. University of Natal, Pietermaritzburg 3200, South Africa. 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