目前,秋播油菜在江南南部处于盛花期,江南北部、西南大部处于初花期,长江中下游地区多处于蕾薹期至初花期,陕西和河南处于抽薹期。受冬春季积温偏高等因素影响,早春油菜病虫害发生期提前、发生程度重于常年。截至3月4日,全国油菜病虫害发生面积为2304万亩,比上年同期减少9.0%,但比近5年均值增加6.6%。一、发生动态1.菌核病全国发生面积435万 At present, the autumn sowing rape is in the flowering period in the southern part of southern Jiangnan, northern part of Jiangnan, most of the southwestern part in the early flowering stage, and the middle and lower reaches of the Yangtze River are mostly in the bud-flowering stage and the flowering stage in Shaanxi and Henan. Affected by the winter and spring accumulated high temperature and other factors, the occurrence of early spring rape pests and diseases in advance, the degree of occurrence heavier than perennial. As of March 4, the area of ​​rape pests and diseases nationwide was 23.04 million mu, a decrease of 9.0% over the same period of last year, but an increase of 6.6% over the average of the past five years. First, the occurrence of a dynamic 1. Sclerotinish disease occurred throughout the country 4.35 million