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Alternaria Blight in Pigeonpea

Alternaria Blight


  1. Caused by Alternaria alternata/ A.tenuissima.
  2. Cause problems in late-sown crops.
  3. Sporulates well under warm, humid conditions.


  1. Small, circular, necrotic spots on leaves (Fig.99) forming typical concentric rings.
  2. The lesions appear on all aerial plant parts including pods.
  3. Blighting of leaves and severe defoliation and drying of infected branches.


  1. Select fields away from perennial pigeonpeas.
  2. Select seed from healthy crops.
  3. Maneb 3g per liter of water is effective.


Blighting of leaves
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