大白菜菌核病病菌可随大白菜入窖时带入,或原有菜窖中已有上年发病株上的菌核病菌在其土中。针对贮藏期大白菜菌核病日益严重之趋势,必须采取相应的防治办法。其主要措施如下:1.在田间及时排除积水,降低菜田湿度;切勿过多施用氮肥,以减轻贮藏期发 Chinese cabbage sclerotinia bacteria can be brought into the cellar with Chinese cabbage, or the original vegetable cellar in the previous year had the onset of sclerotinia in its soil. In response to the growing serious cabbage during the storage of the trend of the disease, we must take appropriate control measures. The main measures are as follows: 1 in the field in a timely manner to eliminate stagnant water, reduce vegetable field humidity; not excessive nitrogen fertilizer to reduce the storage period