Optimal Conditions
Late spring, with its warm weather and humid conditions.
Signature
Circular, powdery-looking blotches on the tops of the leaves. It mostly affects the gourd family, as well as peas and beans.
Prevention
Adequate spacing of plants and using drip irrigation, as surface water connecting with the leaf increases the probability of infection.
Coping
Cutting off affected leaves and culling overcrowded plants.
Eradicating
Apply a milk spray of 1 part full-cream (whole) milk to 10 parts water.