韭菜灰霉病是一种常见性病害,初发生时叶片上产生白色小点,扩大后呈圆形或梭形病斑,病班愈合后可使半叶或全叶枯死。湿度大时,病斑上产生灰色或褐色绒毛状霉层。收割后如果田间潮温,可从刀口处向下腐烂,老茬韭菜畦,从近地老叶基部呈现渍状腐烂,同时病斑上密生灰色霉层: Botrytis cinerea is a common sexually transmitted disease, the first occurrence of small white spots on the leaves, expanded to a round or fusiform lesion, sick class after healing can make half-leaf or whole-leaf dead. When humidity is high, gray or brown fleece-shaped molds develop on the lesion. If the harvest after harvest if the field temperature, down from the knife at the rot, the old crop leeks, from the base near the old leaves showed a stain-like decay, while the lesion gray mold layer: