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黑腐病是由黄单孢杆菌引起的细菌性病害,除危害花椰菜外,还危害白菜、甘蓝、萝卜等十字花科蔬菜。近年来花椰菜黑腐病呈逐年加重趋势,严重影响了花椰菜的产量和品质。症状。植株受病菌侵染后,叶片从叶缘开始发病,自叶脉先端向内和两侧扩展形成“V”字形黄褐色病斑,叶脉坏死变黑,空气干燥时病部干而脆,潮湿时病部组织腐烂,茎和根部被害维管束变黑。综合防治措施。1.苗床消毒:药剂可选用福尔马林。方法是:每平方米苗床用福
Black rot is a bacterial disease caused by Xanthomonas. It not only endangers cauliflower, but also endangers cruciferous vegetables such as cabbage, cabbage and radish. In recent years, cauliflower black rot is increasing year by year, seriously affecting the yield and quality of cauliflower. symptom. After the plant is inoculated by the germs, the leaf begins to develop from the leaf margin, expands inwardly and flanked by the apex of the veins to form a “V” shaped brown spot, the necrosis of the vein becomes black, and the part becomes dry and brittle when the air is dry When the diseased tissue rot, stem and root damage vascular bundle black. Comprehensive prevention and control measures. 1. Seedbed disinfection: Pharmacy optional formalin. The method is: every square meter seedbed blessing