Powdery mildew: Erysiphe polygoni

Symptoms

• The disease appears as on the foliage and pods.
• Infection is first apparent on the leaves as small slightly darkened areas, which later become white powdery spots.
• These spots enlarge and cover the entire leaf area.
• Severely infected leaves may become chlorotic and distorted before falling. Affected pods are small in size and malformed.

Management

• Spray inorganic sulphur 0.25% or Tridemorph 0.1%.