Sclerophthora rayssiae var. zeae
brown stripe downy mildew
n/a
Asia: India, Myanmar, Nepal, Pakistan, Thailand.
Not known occur
2025-02-07
fungus
China
Main: corn; Other: crabgrasses
SCPHRZ
Sclerophthora rayssiae var. zeae is is seedborne in corn seeds; however it is typically transmitted by wind, rain, and soil.
3 Known Hosts
Digitaria spp.
crabgrass
No
CABI CPC, SCPHRZ-4
No references found indicating seed is a pathway. Maybe inferred because seed is a pathway in corn. Primarily soil borne.
2025-02-07 16:41:56
Sorghum bicolor
sorghum
Not a host
CABI CPC
No references found indicating sorghum is a host in nature.
2025-02-07 16:42:15
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Zea mays
corn
Yes
SCPHRZ-2, SCPHRZ-3, CABI CPC, SCPHRZ-6
Oospores external, Hyphae may be internal.
Yes
Embryo staining and microscopic examination.
This test has not been validated or standardized.
SCPHRZ-2, CABI CPC, SCPHRZ-7
Chemical, cultural
Metalaxyl, other systemic fungicides. Resistant cultivars available. Cold storage reduced infection.
SCPHRZ-3, CABI CPC, SCPHRZ-5
2025-02-07 16:49:40
Singh, et. al. 1967, Internally seedborne nature of two downy mildews on Corn. Plant Disease Reporter 51; 1010-1012
Global Pest and Disease Database - Version 2.3.11, 2012; Pest ID 600. Developed by the Center for Integrated Pest Management; USDA
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Bains SS, Jhooty JS, Sokhi SS, Rewal AS, 1978. Role of Digitaria sanguinalis in outbreaks of brown stripe downy mildew of maize. Plant Disease Reporter, 62(2):143
Sangam Lal, Thakur Prasad, 1989. Detection and management of seed-borne nature of downy mildew diseases of maize. Seeds & Farms, 15(6):35-40
Lal S, Saxena SC, Upadhyay RN, 1980. Control of brown stripe downy mildew of maize by metalaxyl. Plant Disease, 64(9):874-876
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