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Cultural Control for Rice Tungro Disease
1. Adjustment in agronomic practices enables rice crop to become tolerant with increase in age of the crop.
2. In general even a susceptible variety does not take up the infection beyond 75 days of age.
3. Young seedlings in the nursery are more vulnerable for the attack by the vectors as well as infection by virus.
4. Sowing time should be so adjusted to avoid peak population of vectors.
5. The seedlings are susceptible at the time of transplanting. Protection of seedlings with insecticides in seed bed as well as in early stages of transplanting is crucial in the management of tungro virus disease.
6. In a rice-based cropping pattern, especially in tungro-endemic areas, inclusion of non-host crops like Legumes, Oilseeds, Fibres or Tubers in the crop rotation will help to interrupt the disease perpetuation and prevent vector build-up.
7. Diseased plants serve as a source of virus. Through and periodic rouging and removal of affected plants reduce the inoculum source and effectively contain the spread of the disease.
DRR training manual ( Dr. Krishnaveni)