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Rice In Sri Lanka - Rice Diseases

Root knot

Species of the nematode Meloidogyne cause root knot.The nematode becomes inactive after prolonged flooding.


  • The disease symptoms include enlargement of the roots and the formation of galls or knots. 
  • The swollen female nematode can be found in the center of this tissue.
  •  Plants are dwarfed, yellow, and lack vigor

Control measures

Deep ploughing and application of organic matter help reduce the disease condition.