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Clemson University - USDA Cooperative Extension Slide Series, www.insectimages.org
Is this a Minor Pest?
Yes
Minor Pest Title
Soybean downy mildew (Peronospora manshurica)
Minor Pest Description
Early stages of the disease are characterised by indefinite yellowish-green areas on the upper surface of the leaves. As the disease progresses, those infected areas become greyish brown or dark brown and have yellowish-green margins. Severely infected leaves fall off prematurely. A greyish mould-like growth develops on the under surface of the spots when weather is wet and temperatures are cool. The disease also attacks the pods and infects the seeds. The disease is favoured by cool temperatures and wet conditions.
Minor Pest What to do.
- Plant certified disease-free seeds.
- Use resistant varieties, if available.
Minor Pest Position
5
Minor Pest Firstcontent
137
Pest Type
fungal
Other Crops
Grapes, hops
Host Plants
Soybean (Under development)
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