Description:

• Moist weather is favourable for the occurrence of this disease.

Damage Symptoms:

• Small, elliptical, dark brown to black spots or lesions, often with a concentric ring pattern, occur on the leaves.
• The leaf spots coalesce to form larger spots, resulting in a blighted appearance.
• Severe infections may lead to leaf drop and defoliation, reducing photosynthesis.

Preventive Measures:

• Keep the field weed-free.

Control Measures:

• Spray copper oxychloride or mancozeb or chlorothalonil.