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Agricultural crops :: Oilseeds :: Castor
Wilt : Fusarium oxysporum
Symptom
  • Leaves are droop and drop off leaving behind only top leaves.
  • Diseased plants are sickly in appearance.
  • Wilting of plants, root degeneration, collar rot, drooping of leaves and necrosis of affected tissue and finally leading to death of plants.
  • Necrosis of leaves starts from margins spreading to interveinal areas and finally to the whole leaf.
  • Spilt open stem shows brownish discolouration and white cottony growth of mycelia much prominently in the pith of the stem. 

Management

  • Selection of disease free seed.
  • Grow tolerant and resistant varieties like Jyothi, Jwala, GCH-4, DCH-30 and SHB 145.
  • Burning of crop debris
  • Green manuring and intercropping with red gram
  • Treat the seed with Thiram @ 3g/ kg or Carbendazim @ 2g/ kg seed or with 4g Trichoderma viride formulation.
  • Multiplication of 2.5 kg T.viride formulation by mixing in 50kg FYM, Sprinkling water and covering with polythene sheet for 15days and then applying between rows of the crops is helpful in reducing the incidence.


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