Rice Pest Pheno - Forecasting
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The diseases generally appears at the maximum tillering stage.
Initial symptoms appears on leaf sheaths as lesions and several of such lesions coalesce with each other and (resembles snake-skin) causes death of all leaf sheaths and entire plant.
These spots do not occur on a regular pattern.
keep the field free from weeds (collateral hosts). Remove and destroy the weed hosts in the field bunds and channels.
Apply recommended dose of nitrogen into 3 to 4 of splits.
Usually initial and typical symptoms will appear on the self-sown rice plants. Then spray proper fungicide to restrict further spread of the disease.
When there is 5-10% damage or 10% infected tillers/1 sq.meter, spray the following chemicals once in 15 days (first dose from 45 to 50 days and second dose from 65 to 75 days).
Validamycin 3L (2.0 ml/l),
Hexaconazole 5 EC (2.0 ml/l) and
Propiconazole 25 EC (1 ml/l)