据全国农技中心病虫害测报处预测,2013年全国秋播油菜产区菌核病仍将重发,程度接近上年,发生面积约5000万亩,其中,湖北江汉平原东部大发生,湖北大部、湖南、江西、安徽偏重发生,长江流域的其他油菜产区大部中等发生,西南地区南部、陕西关中偏轻发生。发病盛期,西南大部、江西、湖南、湖北为3月下旬至4月中旬,安徽、江苏、浙江、上海、河南南部、陕西关中为4月中旬至5月上旬。一、菌核子囊盘萌发旺盛,发病范围广、程度重油菜主产区由于连年或连茬播种,田间积聚了充足的菌 According to the National Center for Agricultural and Pest Insects and Pests Forecasting, in 2013 the national autumn sowing rape sclerotinia will still be re-issued to the extent close to the previous year, the occurrence of an area of ​​about 5000 acres, of which the eastern part of Hubei Jianghan Great happened, most of Hubei In Hunan, Jiangxi and Anhui Provinces, most of the other rapeseed producing areas in the Yangtze River valley occurred moderately, while southern Southwest China and Guanzhong Shaanxi Province were moderately prone. In the peak period, most of the southwestern areas were from the middle of April to the early of May in Guanzhong, Jiangxi, Hunan and Hubei from late March to mid-April, and in Anhui, Jiangsu, Zhejiang, Shanghai, southern Henan and Shaanxi. First, the bacterial nucleocytic disc strong germination, the incidence of a wide range of heavy rape main producing areas due to perennial or continuous cropping, field accumulation of adequate bacteria