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Horticultural crops :: Plantation :: Cocoa
Seedling blight: Phytophthora palmivora
Symptoms
  • The symptoms develop on the leaves and stem of seedlings or budded plants.
  • On leaves, small water soaked lesions appear which later coalesce in the blighting of leaves.
  • On stem, water soaked lesions develop initially and later turn to black colour.
  • Stem infections develop any point on the stem causing the death of seedlings.

Management

  • Remove and destroy the affected seedlings.
  • Spray with 1 percent Bordeaux mixture or 0.2% copper oxychloride just before the onset of monsoon and thereafter at frequent intervals.
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Death of seedlings

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