Paddy Diseases

Yellow Dwarf

Symptoms
  • The infected plants are stunted and have yellowish green to whitish green leaves.
  • There is excessive tillering and leaves became soft and droop slightly.
  • Root growth is also reduced significantly.
  • Chlorosis occurs on the leaves occasionally even spreading to the leaf sheaths.
  • Streaks may also form parallel to the leaf veins.
  • If plants are infected early they usually die before maturity and even if they do survive no panicles are produced or only a small number with no grains.
  • Deep ploughing during summer and burning of stubbles.
  • Rice varieties like IR62 and IR64 are resistant to the disease.
  • The management practices followed for Rice Tungro Disease(RTD) may be adopted for this disease also.
  • Avoiding early planted rice will prevent an increase in vector density and proportion of virus acquired vectors.
  • Planting fallow rice fields with non vector hosts, ploughing fallow paddy fields and late-planting,
    synchronous planting or avoiding an overlap of early and late planted rice crops.
  • Remove weed hosts periodically. .
  • Crop rotation .
  • The vegetation on the bunds should also be sprayed with the insecticides.
  • Chemical Method: Vector control with any one of the following insecticides .

Fungicide

Dosage

Thiamethoxam 25% WG

250g/acre

  Imidacloprid 17.8% SL

200ml/acre

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