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Rice In Sri Lanka - Pests of Rice

Rice sheath mite

Sheath mite can be considered as a serious pest in rice crop causing 5% – 90% yield losses. It is microscopic in size. Sheath mites live in the space between leaf sheaths and feed on the adaxial surface of leaf sheath and developing kernels.


  • High infestation at booting stage of the crop  can be observed as symptoms  of chocolate brown colour lesions on leaf sheaths.

Effective control methods

  • Destroy infected stubbles by plugging just after harvesting or by burning.
  • Sun drying of seed paddy before soaking.
  • Weed management
  • Monitor the crop from early booting stage for chocolate color lesions on leaf sheaths.
  • Single application of recommended insecticides if the signs have been observed.
  • Crop rotation with leguminous crops such a meeng
  • Follow the fied for 2-3 seasons if the problem was not controlled with the above measures.