This disease is caused by the fungus Erysiphe cruciferarum.
Low relative humidity (below 60%) and a temperature range of 15–30°C, along with the absence of rainfall, create favorable conditions for its development.
White, circular spots appear on both sides of the leaves.
Under favorable conditions, the entire plant becomes affected.
Sow the crop on time.
Remove and destroy infected plants from the field.
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