Rice bacterial wilt
Symptoms of leaf wilting within the volume, was dehydration-like, gray-grey, stalks shrink dry, or Qi mud lodging, the hull grayish blue, become the valley. Disease often occurs suddenly in large areas within 1-2 days.
The etiology was 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, not reaching the limit of field, shallow roots are prone to blue and dry. Shallow soil, lack of fertility, or too late to apply nitrogen is also prone to blue and dry.
Control methods (1) Selection of varieties with strong drought resistance. In general, Can rice is more drought-tolerant than Japonica rice and early-maturing. (2) The management of paddy field should be combined with shallow water and open field, and water must not be cut off prematurely, especially sandy soil and leakage land. Avoid long-term deep irrigation, appropriate timely depots, and promote root growth. (3) Reasonable fertilization, base fertilizer should be given enough, top dressing should be applied early, excessive nitrogen application should be avoided, and too late to prevent greediness or premature aging. (4) Advocate the use of multi-functional high-efficiency liquid fertilizer - Wanjiabao, spray Wanjiabao liquid fertilizer 500 times in the booting stage of rice, and spray it once more in 15 days.
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