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花椰菜黑腐病是由黄单孢杆菌属细菌[Xanihomonascampestris(Pam)Dowson]侵染所致,不仅危害花椰菜,且能侵害其他十字花科蔬菜。近几年来,福州地区花椰菜产区发病普遍,尤其粗绒型(俗称“铁花”)受害更为严重。1984年,福州市花椰菜主要产区琅岐乡栽培面积2000多亩,发病率达50～60％,海屿村栽培300多亩,发病率竟高达85％以上,严重影响产量和品质,造成了很大经济损失。黑腐病菌主要侵害维管束,引起维管束坏死变黑,发病多以叶缘或虫伤处开始向内延伸成“V”形不规则的黄褐色病斑,半边维管束受害严重则呈“歪柄”;花苔受害呈明显的黑斑,其花柄横切面可看到维管束变黑。
Cauliflower black rot is caused by the infection of Xanthomonas bacteria [Xanihomonascampestris (Pam) Dowson], not only to cauliflower but also to other cruciferous vegetables. In recent years, the incidence of cauliflower production in Fuzhou area is widespread, especially the coarse cashmere type (commonly known as “iron flower”) victimization is even more serious. In 1984, Fuzhou cauliflower major producing area Langqi Township cultivation area of 2000 mu, the incidence rate of 50 to 60%, 300 acres of sea island village cultivation, the incidence was as high as 85% or more, seriously affecting the yield and quality, resulting in a very Big economic loss. Black rot bacteria mainly damage vascular bundles, causing vascular bundle necrosis black, the incidence of leaf margins or insect pests mostly began to extend inward into a “V” irregular brown spots, half of the vascular damage was severe “crooked Handle ”; flowers were obvious victims of dark spots, the flower stalk cross-section can be seen vascular bundle black.