Black Gram Leaf Crinkle

Black Gram Leaf Crinkle: Leaf Crinkle Virus

  • The earliest symptoms appear on youngest leaves as chlorosis around some lateral veins and its branches near the margin.
  • The leaves show curling of margin downwards.
  • Some of the leaves show twisting.
  • The veins show reddish brown discolouration on the under surface which also extends to the petiole.
  • Plants showing symptoms within 5 weeks after sowing invariably remain stunted and the majority of these deaths due to top necrosis within a week or two.
  • Plants infected in late stages of growth do not show severe curling and twisting of the leaves but show conspicuous venial chlorosis anywhere on the leaf lamina.
  • The disease develops in the fields mainly through seed or rubbing of diseased leaves with the healthy ones.
  • Growing resistant varieties such as VBN 4, VBN 6 and VBN 7
  • Seed treatment with Dimethoate (or) Imidacloprid @ 5 ml /kg
  • Installation of yellow sticky traps 12 nos/ha
  • Rogue out the infected plants up to 45 days
  • Foliar spray of notchi leaf extract 10% at 30 DAS or neem formulation 3 ml/lit
  • Spray methyl demeton 25 EC 500 ml/ha or dimethoate 30 EC 500 ml/ha or thiamethoxam 75 WS 1g /3 lit and repeat after 15 days, if necessary.



  • TamilNadu Agritech Portal
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