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近年来,青花菜种植面积大,但大多露地种植,大棚栽培的不多,主要是大棚内高温高湿的环境有利于病害发生,尤其是黑腐病易发生,发病田块轻者减产,严重时可能绝收。黑腐病在青花菜幼苗期至成株期均会发生。幼苗发病,子叶呈水浸状,后迅速枯死,或蔓延至真叶。成株期发病,主要危害叶片,先从叶缘发病,后向内扩展形成“V”字形枯斑。病斑黄褐色,边缘淡黄色。根部受害,维管束变黑,内部干腐,以至全株萎蔫死亡。花球发病,从球面一点病斑逐渐扩散,严重时整个花球发黑腐烂。
In recent years, large area of broccoli acreage, but most of the open field planting, greenhouse cultivation is not much, mainly in the greenhouse environment is conducive to high temperature and humidity disease, especially the black rot disease prone, the lesser field crop production, serious May be absolutely closed. Black rot occurs in broccoli seedlings to adult plants. Emergence of seedlings, cotyledons were flooded, quickly died, or spread to true leaves. The incidence of adult plants, the main hazard leaves, the first leaf margin disease, after the expansion of the internal formation of “V ” font-shaped dead spots. Spot yellowish brown, yellowish edge. Root damage, vascular bundle darkening, internal dry rot, and even the whole plant wilt death. The incidence of curd, a gradual diffusion from the spherical spots, black flower rotten when the whole flower ball.