Black Gram Bacterial Leaf Blight

Black Gram Bacterial Leaf Blight: Xanthomonas phaseoli

  • The fungus attacks all aerial part parts and at any stage of plant growth.
  • Symptoms are circular, black, sunken spots with a dark center and bright red-orange margins on leaves and pods.
  • In severe infections, the affected parts wither off.
  • Seedlings get blighted due to infection soon after seed germination.
  • The pathogen survives on seed and plant debris
  • The disease spreads in the field through air-borne conidia.
  • The disease is more severe in cool and wet seasons.
  • Use disease free seed
  • Destruction of debris and stubbles.
  • Soak the seeds in 500 ppm Streptocycline solution for 30 min. before sowing followed by two sprays of Streptocycline combined with 3 g of Copper Oxychloride per litre at an interval of 12 days is recommended.



  • TamilNadu Agritech Portal
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