韭菜灰霉病是目前小拱棚韭菜栽培中普遍发生的重要病害,该病危害严重,一般减产幅度为30～40%,严重降低了韭菜的食用性和商品性,严重发生时造成大面积绝产。现将其发病规律和综合防治措施总结如下:一、症状类型发病初期,从叶片尖端向下产生淡褐色至白色小斑点,逐渐扩大成椭圆形病斑,连结成片,造成叶片焦枯。随湿度增加,病情加重,病斑呈水渍状融合成大片,表面产生灰色或褐色霉层,发粘腐烂,且有土霉味。 Botrytis cinerea is the most common disease in Chinese leek cultivation. The disease is seriously endangered. The rate of decrease is generally 30-40%, which seriously reduces the edibleness and commerciality of leeks. . Now the incidence of the law and comprehensive prevention and treatment measures are summarized as follows: First, the early onset of symptoms, down from the tip of the leaves produce light brown to small white spots, and gradually expanded into oval lesions, linked into pieces, resulting in leaf blight. With the increase of humidity, the disease aggravate, spots were water-like fusion into large pieces, the surface gray or brown mildew, sticky rotten, and a musty smell.