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Agricultural crops :: Cash crops :: Cotton

Boll rot

It is a complex disease caused by several fungal pathogens viz., Fusarium moniliforme, Colletotrichum capsici, Aspergillus flavus, A. niger, Rhizopus nigricans, Nematospora nagpuri and Botryodiplodia sp. 

Symptom

  •  Brown or black dots covering entire bolls
  • Rotting may be internal or external
  • Bolls do not open and fall prematurely
Management
  • Adopt optimum spacing.
  • Apply the recommended doses of fertilizers.
  • Spray Carbendazim 1kg or Mancozeb 2 kg/ha from 45th day at 15 days interval.

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