一、问题的提出 我省甘蓝型油菜于1982年又一次普遍地发生了“花而不实”,面积广,危害大,胜过往年。就宣郎广一个地区便有万亩左右田块发病,其中千亩颗粒无收。受害油菜,不仅籽粒产量大幅度下降,而且籽粒畸形,品质显著变劣,含油量一般下降18％。因此,油菜“花而不实”已成为我省当前和今后发展油菜生产的一个严重障碍。但是,对发病原因,其说不一。 First, the question put forward In our province, the rape of cabbage in 1982 once again occurred in a “flower and not real”, a wide area, endangering large, better than in previous years. On the Xuan-Lang Guang area there is a field about mu of disease, of which acres of crop failure. Injured rape, not only a substantial decrease in grain yield, and grain deformity, quality significantly worse, the general decline in oil content 18%. Therefore, the rape “flower but not real” has become a serious obstacle to the current and future development of rapeseed production in our province. However, the incidence of different reasons.