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Peronosclerospora maydis (java downy mildew of maize )
Peronosclerospora maydis
java downy mildew of maize
Peronospora maydis, Sclerospora maydis
Africa: Congo; Asia: China, India, Indonesia, Israel, Japan, Taiwan, Thailand; North America: Jamaica; Oceania: Australia; South America: Venezuela.
Not known to occur
2025-10-08
fungus
Mexico, Korea
Main: corn
PRSCMA
Peronosclerospora maydis causes downy mildew in corn, producing infections that can stunt growth and deform plants. The pathogen can survive in fresh seed, enabling seed transmission, but it cannot survive in dried seed because the low moisture prevents its viability, making only fresh seed a pathway for infection.
1 Known Hosts
Zea mays
corn
Yes
PRSCMA-2, PRSCMA-4, McGEE, PRSCMA-5, PRSCMA-7, PRSCMA-8
Pathogen is only transmitted with freshly harvested immature seed that has not been dried. Once dried (>20%), the pathogen is not transmitted.
Yes
Visual examination
This test has not been validated or standardized
PRSCMA-1
Metalaxyl
Seed storage and drying to less than 20% mositure eliminated seed transmission.
CABI CPC, PRSCMA-6, PRSCMA-9
2025-10-08 17:47:46
PRSCMA-2
Kenneth, RG. 1981. Downy Mildews of Graminaceous Crops. In, The Downy Mildews, ed. Spencer, DM. Academic Press, New York
PRSCMA-4
Bonde, MR. 1982. Epidemiology of Downy Mildews of Maize, Sorghum and Pearl Millet. Tropical Pest Management 28:49-60
McGEE
McGee, DC. 1988, Maize Diseases; A reference source for Seed Technoligists. American Phytopathological Society, St. Paul, MN USA
PRSCMA-5
Mikoshiba H, 1983. Studies on the control of downy mildew disease of maize in tropical countries of Asia. Technical Bulletin of the Tropical Agriculture Research Center, No.16:62 pp.
PRSCMA-7
Semangoen H, 1970. Studies on downy mildew of maize in Indonesia with special reference to the perennation of the fungus. Indian Phytopathology, 23:307-320.
PRSCMA-8
Lukman, R., Afifuddin, A. and Lübberstedt, T., 2016. Tracing the signature of Peronosclerospora maydis in maize seeds. Australasian Plant Pathology, 45(1), pp.73-82.
PRSCMA-1
Peronosclerospora maydis In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
CABI CPC
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
PRSCMA-6
Tantera DM, Bustaman M, Molina RP, 1986. Efficacy of three systemic fungicides against downy mildew (Peronosclerospora maydis (Rac.) Butler) of maize (Zea mays L.). Indonesian Journal of Crop Science, 2(1):37-50
PRSCMA-9
Pakki, S. and Djaenuddin, N., 2019. The Effectiveness Combination of Resistant Varieties and Metalaxil Fungicide in Controlling Downy Mildew Disease (Peronosclerospora Maydis) in Maize Plant. Journal Hama dan Penyakit Tumbuhan Tropika, 19(1), p.287628.
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