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Agricultural crops :: Cash crops :: Cotton

Fusarium wilt : Fusarium oxysporum f.sp. vasinfectum

Symptom

  • Initial symptoms on young seedlings are yellowing and browning of cotyledons, followed by brown ring on the petiole.
  • Finally wilting & drying of the seedling occurs. Symptom at later stages includes loss of turgidity, yellowing, drooping and wilting starting from older leaves.
  • Browning or blackening of vascular tissues occur on the stem and spreads upwards and downwards. Infected plants appear stunted with fewer bolls.
Management
  • Treat the acid-delinted seeds with Carboxin or Carbendazim at 4 g/kg.
  • Remove and burn the infected plant debris in the soil after deep summer ploughing during June-July.
  • Apply increased doses of potash with a balanced dose of nitrogenous and phosphatic fertilizers.
  • ¬†Apply heavy doses of farm yard manure or other organic manures at 100t/ha.
  • Spot drench with 0.05 % Benomyl or 0.1 % Carbendazim.

Vascular browning Yellowing of leaves


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