• Rough, circular, cherry red to dark red spots on the upper leaf surface.
  • The centre becomes silvery grey when spores are produced. In severe cases, defoliation occurs.

Procedure for Observation

Select 25 plants at random and observe for typical fresh symptoms.


  • 5 plants showing fresh symptoms
  • Control Measures

  • Destroy diseased debris.
  • Use pathogen free seeds from healthy plants.
  • Seed treatment with carbendazim or thirum @2g/kg of seeds.
  • Spray mancozeb (0.2%) or carbendazim (0.2%) at fortnightly interval.