Control method of rape root tuber disease
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First, the symptoms of the disease, the main damage to the roots of the disease, the main root or lateral root swollen, deformed, late color brown, rough surface, rotten odor, few root hair, yellow leaves, the whole plant died when severe. Second, the incidence of acidic soil conditions more vulnerable to disease, soil moisture content of 20% to 40% when the disease is heavy. Third, prevention and control methods (a) selected no disease field nursery, found the diseased plants in a timely manner, and scattered in the diseased lime disinfection, or with 75% of quinoline nitrobenzene 700 times Irrigation roots, each hole irrigation 0.3 to 0.5 kg . (b) About 75 kg of slaked lime per acre. (c) Ditch drainage to reduce soil moisture. (d) selection of disease-resistant varieties.