Many lesions may develop close together and coalesce to kill large portions of the leaf.

Mid-rib infection often occurs and is seen as elongate-elliptical red or purple lesions on which the black acervuli can be clearly seen.

Infected stems when split open show discoloration (depending on cultivar) which may be continuous over a large area, or more marbled appearance

Seed treatment with Captan or Thiram @ 4g/kg of seed.

Spray with Mancozeb 1 kg/ha.