• It causes significant economic damage when infection takes place at silking stage and conditions are optimum. In early stages slightly oval, water soaked, small spots produced on leaves.These grow into elongated, spindle-shaped necrotic lesions
• They appear first on the lower leaves and continue increasing in size and number as plant develops,until the complete ‘burning’ of foliage is conspicuous. 
• These spots are long, elliptical, grayish-green or tan lesions ranging from 2.5 to 15 cm in length.

Management

• Spray Mancozeb or Zineb @2-4 g/litre at 10 days interval after first appearance of the disease