病毒病、霜霉病、软腐病、菜青虫、地老虎幼虫、地蛆、黄条跳(虫甲)等,是秋白菜生产上的主要病虫害,是造成秋白菜减产的重要因素.其中病毒病、霜霉病、软腐病对大白菜的危害最重.夏秋高温干旱会使病毒病较重,因为高温干旱不利于大白菜的生长,却有利于传毒媒介蚜虫的迁飞.高温还能损伤白菜根系,容易遭受土壤残毒侵染.此外,病毒病发生的轻重与降雨量有关,在大白菜生长前期,降雨量大, Viruses, downy mildew, soft rot, cabbage caterpillars, tiger larvae, maggots, yellow stripes (pest) and so on are the major pests and diseases in the production of autumn cabbage and are the important factors to reduce the yield of autumn cabbage. , Downy mildew, soft rot disease on the most harmful to Chinese cabbage.During the summer and autumn high temperature and drought will make the virus disease heavier, because the high temperature and drought is not conducive to the growth of Chinese cabbage, but conducive to the transfer of aphid insecticide .High temperature Damaged cabbage root system susceptible to residual soil infection.In addition, the severity of the virus disease and rainfall related to the early growth of Chinese cabbage, heavy rainfall,