Description: Downy mildew appears on the upper surface of young leaves as pale green to yellow spots that enlarge into bright yellow lesions of indefinite size and shape. During moist weather lesions on the lower leaf surface are covered with tufts of grayish mold growth. Seeds may be encrusted with dull, whitish mold growth.

Location: Wherever soybeans are grown in the state.

Time of infection: First symptoms may be seen on trifoliate leaves of young plants in June during periods of high humidity and cool temperatures. Disease spread continues if temperatures remain cool.

Management:
· Seed treatment
· Crop rotation
· Tillage