• The spots of 1-2mm diameter appear in more numbers, covering both sides of leaf.
• The attacked leaf presents a reddish brown appearance instead of the normal green colour.
• These spots coalesce to form irregular bigger patches.

Management

• Field sanitation
• Spray with Mancozeb 0.25% or copper oxy chloride 0.25% immediately after the appearance of symptom and at 15 days interval.