近年来,在油菜生产中,常出现分段结实现象,造成减产。其症状表现是:有效花序段部分花蕾尚未开放,即黄化脱落;或能正常开花,但部分花不能正常发育成结实角果,即枯萎脱落;有的花即使发育成角果,也只是仅 In recent years, rapeseed production, often appear segmented and strong phenomenon, resulting in reduced production. Symptoms are: part of the effective inflorescence buds are not yet open, that is, yellow shedding; or flowering, but some flowers can not normally develop into solid fruit, ie withered off;