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Cercospora zeae-maydis (gray leaf spot )
Cercospora zeae-maydis
gray leaf spot
Cercospora sorghi var. maydis
Africa: Cameroon, Congo, Eswatini, Ethiopia, Kenya, Malawi, Mozambique, Nigeria, South Africa, Tanzania, Uganda, Zambia, Zimbabwe; Asia: China, Nepal; North America: Canda, Costa Rica, Mexico, Trinidad and Tobago, USA; South America: Brazil, Colombia, Ecuador, Peru, Venezuela.
CO, IA, IL, IN, KS, KY, MN, NY, NC, OH, PA, SC, VI, WI.
2024-09-02
fungus
Thailand
corn
CERCZM
Cercospora zeae-maydis is only known to infect corn, and seed is not reported as a pathway. CXXXX overwinters on infested corn residue. After periods of high humidity, the fungus produces conidia in infested debris which then can be wind-blown to infect newly planted crops.
1 Known Hosts
Zea mays
corn
No
CERCZM-1,CABI CPC,RICH ISTA,CERCZM-5
Seed is not known to be a pathway. There is no evidence for transmission of Cerospora zeae-maydis by seeds. Fungal spores from plant debris serve as primary inoculum (CERCZM-1).
Yes
Agar plating
Although Cercospora zeae-maydis is not seed borne. Some countries require that seeds be tested for the presence of spores on the seed surface.
Agar plating is the standard method of the NSHS
CERCZM-3,CERCZM-4
Cultural
Crop rotation and deep ploughing can help reduce inoculum. Resistant varieties are suggested as well as fungicides to prevent and reduce the rate of disease.
CABI CPC,CERCZM-6,CERCZM-7
CERCZM-1
McGee, DC. 1988. Maize Diseases: A reference Source for Seed Technologists. APS Press, St. Paul, MN USA. 150 pp.
CABI CPC
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
RICH ISTA
Richardson, MJ. 1990. An Annotated List of Seedborne Diseases. International Seed Testing Association, Zurich Switzerland.
CERCZM-5
Beckman, P. M., & Payne, G. A. (1982). External growth, penetration, and development of Cercospora zeae-maydis in corn leaves. Phytopathology, 72(7), 810-815.
CERCZM-3
Seed Health Testing Method for Cercospora zeae-maydis Mz 13.1 National Seed Health System, 2019. www.seedhealth.org
CERCZM-4
Cercospora zeae-maydis. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
CERCZM-6
Huff, C. A., Ayers, J. E., & Hill Jr, R. R. (1988). Inheritance of resistance in corn(Zea mays) to gray leaf spot. Phytopathology, 78(6), 790-794.
CERCZM-7
ur Rehman, F., Adnan, M., Kalsoom, M., Naz, N., Husnain, M. G., Ilahi, H., ... & Ahmad, U. (2021). Seed-borne fungal diseases of maize (Zea mays L.): A review. Agrinula: Jurnal Agroteknologi dan Perkebunan, 4(1), 43-60.
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