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Cercospora zeae-maydis (gray leaf spot )
Cercospora zeae-maydis
gray leaf spot
Cercospora sorghi var. maydis
Africa, China, North, Central and South America, Europe
Midwest and Eastern US corn states.
2021-04-08 16:17:03
fungus
Thailand
corn
CERCZM
Although Cercospora zeae-maydis is not seedborne, some countries require that seeds be tested for the presence of spores on the seed surface (CABI, 2020). A unnamed Mycosphaerella spp. has been identified as the prefect state of this fungus.
1 Known Hosts
Zea mays
corn
No
CERCZM-1,CERCZM-2,CERCZM-4
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
Agar plating is the standard method of the NSHS
CERCZM-3,CERCZM-4
Gray leaf spot is typically controlled in the field with fungicides and crop rotation.
CERCZM-1
McGee, DC. 1988. Maize Diseases: A reference Source for Seed Technologists. APS Press, St. Paul, MN USA. 150 pp.
CERCZM-2
Richardson MJ, 1990. An Annotated List of Seed-borne Disease. International Seed Testing Association, Zurich, Switzerland
CERCZM-4
Cercospora zeae-maydis. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
CERCZM-3
Seed Health Testing Method for Cercospora zeae-maydis Mz 13.1 National Seed Health System, 2019. www.seedhealth.org
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