大豆菌核病是大豆作物上常见病害之一,主要造成茎秆腐烂,病变部位苍白色,茎杆内中空并有黑色菌核,易折断,结荚少或不结荚。一般减产30%以上,这两年,大豆菌核病有逐年加重发生趋势。田间菌核数和环境因素是该病发生轻重的重要因素。为了有效控制大豆菌核病的发生,提高大豆产 Soybean sclerotinia is one of the common diseases on soybean crops, which mainly causes the stalk to decay, the lesion is pale, the stalk is hollow and has a black sclerotia, easy to break, the pod is little or no pod. Generally reduce production of more than 30%, the past two years, soybean sclerotinia have increased year by year trend. The number of field bacteria and environmental factors is an important factor in the severity of the disease. In order to effectively control the occurrence of soybean sclerotinia and improve soybean production