How to Control Rice Bacterial Wilt and Seedling Blight at Seedling Stage
Rice bacterial wilt is caused by the physiological loss of rice. Occurred in the filling stage of late rice, premature water shortage, dry hot air, the loss of water caused a large area of ​​blue and dry. Long-term deep irrigation, shallow roots are prone to blue and dry. The shallow soil layer, lack of fertility, or late application of nitrogen are also prone to blue-green.
Rice blight is one of the most important diseases of rice breeding in dryland. The main causes of the disease are low temperature, large temperature difference, partial alkali, lack of light, weak seedlings, and excessive seed size. After the emergence of seedlings withered, easy to pull off, stem base rot, rotten pear taste, the incidence of heavier whole piece died, the disease plant base has long red moldy material. Seedlings in the 2-3 leaf stage near the end of the depletion of the endosperm, the worst cold resistance, the daily average temperature is lower than 12-15 °C is fertility blocked, disease resistance significantly weakened, easy to invade the bacteria, this time if the case of low temperature and easy to rain Blight occurs. Therefore, the 2-3 leaf stage of drought seedlings is the main period of blight epidemic.
When the bacterial wilt of rice seedling stage is not serious, it can be controlled by a chemical containing copper rosinate, methazophenone and other components. Bacterial blight can be controlled by an agent containing components such as hymexazol, thiram and diarylone. Specific attention Matters and usage according to product packaging instructions.
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