Symptom

• The disease may occur in all stages but more severe when plants are 45-60 days old.
• Small, plate to brown, irregular or round spots, may appear on the leaves.
• Each spot has a central lesion surrounded by concentric rings.
• Several spots coalesce together to form blighted areas.
• The affected leaves become brittle and fall off.
• Sometimes stem lesions are also seen.
• In severe cases, the spots may appear on bracts and bolls.

Management

• Remove and destroy the infected plant residues.
• Spray Mancozeb or Copper oxychloride at 2kg/ha at the intimation of the disease.
• Two to three sprays may be given at 15 days interval.