Peronosclerospora philippinensis
phillipine downy mildew of maize
Sclerospora phillipinensis, Sclerospora maydis
Africa: Mauritius; Asia: Bangladesh, China, India, Indonesia, Nepal, Pakistan, Philippines, Taiwan, Thailand.
Not known occur. Reports of pathogen in the US have not been verified (PRSCPH-4)
2024-11-18
fungus
Mexico
Main: corn; Other: Poaceae family such as oats, sugarcane, and sorghum
PRSCPH
Downing mildew caused by Peronsclerospora phillippensis is primarily a disease of tropical Asia and Africa. It is one of the most destructive diseases of corn globally. It is commonly dispersed by air currents and rainsplash. It can be spread through corn seeds, especially if not properly dried. This is on the USDA Plant Protection And Quarantine (PPQ)
Select Agents and Toxins list. P. philippinensis closely resembles P. sacchari.
4 Known Hosts
Avena sativa
oat
No
No references found indicating seed is a pathway.
Saccharum officinarum
sugarcane
No
No references found indicating seed is a pathway.
Sorghum bicolor
sorghum
No
No references found indicating seed is a pathway.
Zea mays
corn
Yes
PRSCPH-3, PRSCPH-4, CABI CPC, USDA-FD, PRSCPH-7, PRSCPH-8
The pathogen is only transmitted with freshly harvested immature seed that has not been properly dried. Transmission ceased once seed is dried to less than 30% moisture.
Yes
Embryo examination
Two embryo examination methods described. Neither method has been standardized or validated for clinical use.
PRSCPH-2, CABI CPC, PRSCPH-7
Chemical, cultural
Resistant cultivars available. Do not harvest immature seed and seed storage and drying to less than 20% mositure eliminated seed transmission.
PRSCPH-3, PRSCPH-4, CABI CPC
2024-11-18 12:05:36
Exconde OR, Molina AB, 1978. Note: Ridomil (Ciba-Geigy) a seed-dressing fungicide for control of Philippine corn downy mildew. Philippine Journal Crop Science, 3:60-64.
Global Pest and Disease Database - Version 2.3.11, 2012; Pest ID 512. Developed by the Center for Integrated Pest Management; USDA
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
USDA Fungal Database, https://fungi.ars.usda.gov
Murray, G. M., 2009. Threat specific contingency plan: Philippine downy mildew of maize (Peronosclerospora philippinensis) and downy mildew of sorghum (P. sorghi). Australia: Plant Health Australia
Bains SS, Jhooty JS, 1982. Distribution, spread and perpetuation of Peronosclerospora philippinensis in Punjab. Indian Phytopathology, 35(4):566-570
Singh, et. al. 1967, Internally seedborne nature of two downy mildews on Corn. Plant Disease Reporter 51; 1010-1012
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