油菜病害种类很多,常见的有菌核病、病毒病、霜霉病、自锈病以及细菌性黑斑病、软腐病、黑斑病等。一个地区的油菜,往往受多种病害的危害,而且在整个生长期中常先后或同时发生。多种病的发生和发展,与油菜栽培环境条件关系十分密切,因此,防治油菜病害应以农业防治措施为基础,因地制宜地配合好药剂防治的策略,从轮作、选用无病健种及种子处理、深沟窄畦防积水、科学施肥、中耕培土、田园卫生等方面创造有利油菜生长发育,不利病菌发生发展的环境条件,注意病害动向,达到指标时及时施药,能收到较好效果。一、轮作倒茬一般病害病原菌都有各自的寄主范围,而且绝大多数病菌在水中存活期较短,因此,施行油 Many varieties of rape disease, common sclerotial disease, viral disease, downy mildew, rust and bacterial black spot disease, soft rot, black spot and so on. Rapeseed in one area is often endangered by many diseases and often occurs simultaneously or simultaneously throughout the growing season. Therefore, the prevention and control of rape disease should be based on agricultural control measures, according to local conditions with good prevention and control of pesticides strategy, from rotation, the selection of disease-free seed and seed treatment , Deep trench narrow 畦 anti-water, scientific fertilization, cultivating soil cultivation, pastoral health and other aspects to create a favorable rape growth and development, unfavorable germs occur environmental conditions, pay attention to disease trends, timely application of indicators to achieve better results . First, the crop rotation crop disease pathogens have their own host range, and the vast majority of bacteria in the water has a shorter survival period, therefore, the implementation of oil