大白菜是我省主要的秋菜,是我省冬春半年的主食蔬菜,但大白菜在生长期间常因病虫为害每年减产的15％左右,严重年份甚至达50％以上。 大白菜的主要病虫害有病毒病、软腐病、黑腐病、细菌性角斑病、叶斑病、霜霉病、白斑病、炭疽病、菜蚜、菜青虫、小菜蛾、黄条跳(虫甲)、甘兰夜蛾、地蛆等。大白菜苗期最易感染病毒病,发病后植株抗病力减弱,后期易感染霜霉病、软腐病等,严重影响产量,所以加强苗期管理,及时消灭传毒蚜虫,搞好苗期病毒病的防治是十分 Chinese cabbage is the main autumn vegetable in our province. It is the staple vegetable in winter and spring in our province. However, cabbage is often reduced by about 15% due to pests and diseases during the growing season, even reaching 50% in severe years. The main pests of Chinese cabbage are virus disease, soft rot disease, black rot, bacterial angular leaf spot, leaf spot disease, downy mildew, white spot disease, anthracnose, aphid, cabbage worm, diamondback jumping A), cabbage Lantern, maggots and so on. Chinese cabbage is the most susceptible to virus disease at seedling stage, after the onset of plant weakened disease resistance, late susceptible to downy mildew, soft rot and so on, seriously affecting the yield, so strengthen seedling management, timely elimination of aphids, Prevention of the virus disease is very