当前,我国冬油菜在西南地区和江南南部处于盛花期,江南北部和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。由于冬季全国大部地区气温较常年同期偏高,早春油菜病虫害发生期提前,发生程度重于常年。截至3月5日,全国油菜病虫害发生面积为2651万亩,比上年同期增加15.1%。一、发生动态(一)菌核病全国发生面积671万亩,比上年同期增加54.3%。受冬季和近期温度较常年偏高的 At present, winter rapeseed is in full flowering stage in southwestern China and southern southern part of China. Northern part of Jiangnan and the middle and lower reaches of the Yangtze River are mostly in the bud-flowering stage and in Shaanxi and Henan in the bolting stage. Due to the winter temperatures in most parts of the country are higher than the same period of previous years, early spring rape pests and diseases occur ahead of schedule, the degree of occurrence is heavier than perennial. As of March 5, the national rape pests and diseases occurred in an area of ​​2651 mu, an increase of 15.1% over the previous year. First, the occurrence of dynamic (a) sclerotinish disease area of ​​6.71 million mu nationwide, an increase of 54.3% over the previous year. By the winter and recent temperatures higher than normal