一、发病症状棚室菜豆细菌性疫病主要危害其叶片、茎蔓和豆荚,也可侵染种子。叶片染病,从叶尖或叶缘开始,初呈暗绿色油渍小斑点,扩大后呈不规则形。病部变褐而干枯,呈薄而半透明状,周围出现黄色晕圈,并溢出淡黄色菌脓,干燥时生白色或黄色菌膜。病重时叶上病斑相连,全叶枯萎,最后病叶破碎。叶受害时呈扭曲状,皱缩脱落。茎部发病时,病斑呈红褐色溃疡状条斑,中央稍凹陷,病斑围茎一周时便 First, the symptoms Symptoms Cabbage bean bacterial blight the main harm to its leaves, stems and pods, but also invade the seeds. Leaf disease, starting from the tip or leaf margin, the beginning of the dark green spots of small oil stains, expanded to irregular shape. Patient brown and dry, was thin and translucent, around the yellow halo appeared, and overflow yellowish pus, when dry white or yellow bacteria. When diseased leaves are connected with diseased leaves, the whole leaves are withered, and finally the diseased leaves are broken. Leaf damage was twisted, wrinkled off. The incidence of stems, lesions were reddish brown ulcer-like stripe, the central slightly depressed, lesions around the stem of a week then