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. Pest is on USDA Plant Protection and Quarantine Select Agents and Toxins list.
Crops
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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