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大白菜根肿病是一种土传真菌病害,普遍存在于大白菜种植区。近年由于连作等因素的影响,使一般地块的发病株率在35%左右,严重田块可达50%以上,已成为大白菜生产的一大障碍,给农民经济带来巨大损失。发病原因:图1白菜根肿菌休眠孢子囊引起大白菜根肿病的病原为鞭毛菌亚门芸苔根肿菌,其休眠孢子囊球形、卵形或椭圆形(图1),充塞于寄主细胞内,形如鱼卵状,成熟时相互离开。休眠孢子萌发产生洋梨形或球行游动孢子,前端具两根长短不
Chinese cabbage clubroot disease is a soil-borne fungal disease, common in Chinese cabbage growing areas. In recent years, due to the influence of continuous cropping and other factors, the incidence rate of ordinary land plots is about 35%, and severe land plots can reach more than 50%, which has become a major obstacle to the production of Chinese cabbage and has brought huge losses to the peasants’ economy. The cause of the disease: Figure 1 cabbage root swollen bacteria caused by dormant sporangium cabbage clubbing etiology of pathogens Flammulina subgenus brassicae bacteria, the resting sporangium spherical, oval or oval (Figure 1), stuffed in the host cells Inside, shaped like a fish-like, leave each other mature. Dormant spores germination produce pear-shaped or ball zoospores, the front has two lengths not