十字花科蔬菜细菌性病害主要有黑腐病和软腐病两种,发生和危害较重,足大白菜、甘蓝等十字花科蔬菜生产上的重要病害,现对两种细菌性病害的发生特点及综合防治做一介绍。一、十字花科蔬菜黑腐病1、病源及症状:黑腐病是一种较为普遍发生的病害。病源细菌为甘蓝黑腐黄单胞杆菌。该病发生在十字花科蔬菜上,尤以芸薹属为主,其中以甘蓝、花椰菜、萝卜受害最重,白菜次之。黑腐病在苗期间即可发病,但以成株期发病为甚。病害主要侵害叶、叶柄、花序和茎杆。叶片发病,最 Cruciferae vegetable bacterial diseases are mainly two kinds of black rot and soft rot, occurrence and harms heavy foot cabbage, cabbage and other cruciferous vegetables important disease, now two kinds of bacterial diseases occur Features and comprehensive prevention to do an introduction. First, black rot of cruciferous vegetables 1, the source and symptoms: black rot is a more common disease. Pathogenic bacteria cabbage black rot bacillus Xanthomonas. The disease occurs in cruciferous vegetables, especially Brassica, of which the cabbage, broccoli, radish most affected, followed by cabbage. Black rot can be disease during the seedling, but the incidence of adult stage is staggering. Diseases mainly affect leaves, petioles, inflorescences and stems. Leaf incidence, most