Identification of Bacterial blight disease in Cotton crop

  • Bacterial scorching disease can affect any part of the infected plant and any stage of plant growth.
  • In the early stages of plant growth, submerged, spherical or irregular wounds spread to the stem and eventually die of withering and sprout which is known as seedling blight.
  • Small, dark green, submerged angular spots first develop on the lower surface of the leaves, gradually these spots grow dark brown and later these spots appear on the surface of both leaves, called the angular leaf spot. 
  • In this, the veins of the leaves turn black and the leaves start to appear wrinkled and twisted. Which is called vein necrosis.
  • Black wounds on the trunk and branches and premature fall of leaves is a symptom known as Black Arm. 
  • In this disease, rotten seeds and fibers become colorless in the bolls. In the infected boll, the angular round submerged spots appear which become pitted and dark brown or black over time, this is called Boll rot.
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