1. Rotate with grass crops for more than three years to avoid the source of bacteria: The diseased field should be deep-turned after harvesting, bury the sclerotia in the deep layer of the soil, remove the diseased bodies out of the field, and reduce the bacteria source; Disease varieties, selected seeds, remove diseased granules, sclerotinia blocks, insect-eaten grains, impurities, etc., require a purity of more than 97%, a germination rate of more than 95%, a moisture content of less than 13%; rational fertilization, cultivation of strong seedlings, To enhance disease resistance, organic fertilizers must be thoroughly fermented to kill pathogenic bacteria, N, P, and K should be properly matched. Reasonable dense planting should be closely planted according to the characteristics of the varieties. Soybeans should be cultivated in a timely manner after the onset of diseases to promote rooting and sclerotia. Buried deep in the soil to reduce the disease; organized farmers to do a field survey, seriously patrol the key plots, found that the diseased plants should be removed in a timely manner, brought out of the field and buried deep processing.

2, on the basis of timely field inspections, it is necessary to control the spraying in the early stages of disease. When the disease area is large, not only the diseased plant should be removed in time, but also the spraying protection should be applied around the diseased plant. When it is necessary to spray all over the field, a motorized mist sprayer should be used. The nozzles should be operated downwards to ensure that the middle and lower plant leaves are dragged with pesticides or sprayed with self-propelled high-rod sprayers. According to the investigation of the control effect of various regions, the current medicines with better control effect on sclerotinia have 50% procymidone, 40% sclerotin, 25% prochloraz, 50% iprodione, 1.5 kg/ha, on water Spray, apply once every 7 days.

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