由于今年雨水特别多,白菜、芥菜、甘蓝等十字花科蔬菜播种后易发生根肿病,农民朋友要提早预防。现将根肿病的发病原因、症状及防治方法介绍如下:一、发病原因根肿病是由芸苔根肿菌侵染所致的土传真菌病害,病菌在土壤里可活6～7年,在土壤、病残体和未腐熟的有机肥上越冬,危害大白菜、小白菜、甘蓝、萝卜和芥菜等多种 Due to the large amount of rain this year, cabbage, mustard, cabbage and other cruciferous vegetables prone to clubroot disease after planting, farmers and friends to prevent as soon as possible. The pathogenesis of clubroot disease, symptoms and prevention methods are described below: First, the cause of clubroot disease is caused by the infection of soil Brassica parasite fungal disease, the bacteria can live in the soil 6 to 7 years , Overwintering in the soil, the diseased body and the non-decomposed organic fertilizer, endangering many kinds of Chinese cabbage, Chinese cabbage, cabbage, radish and mustard