今年油菜种植面积大、感病品种比例高,菌核病主发区菌源充足,田间子囊盘密度较高,且江淮北部、西南地区东南部4-5月份降水偏多。综合以上因素分析,预计2014年秋播油菜菌核病偏重发生,程度重于上年,发生面积约5000 This year rapeseed planting area, a high proportion of susceptible varieties, sclerotinia main source of adequate bacteria, astronomical high density disk, and the northern JAC, southeastern southwest 4-5 month precipitation more. Based on the above analysis of factors, it is estimated that the occurrence of Sclerotinia sclerotiorum in autumn 2014 is more serious than in the previous year, with an area of ​​about 5000