大棚韭菜极易发生灰霉病。该病主要危害叶片,病叶密生灰色绒毛状霉层,后期病斑互相融合成大片,直至半叶或全叶腐烂,并伴有霉味,使品质和产量受到严重影响。防治该病可从以下几个方面着手:(1)加强扣棚前的管理。扣棚前一个月施足肥,养好根,培育壮苗,以增强韭菜对 Greenhouses leek prone to gray mold. The disease is mainly endangering leaves, diseased leaves of gray hairy mold layer, the latter part of the merger into large lesions, until the half-leaf or whole leaf decay, and accompanied by musty, the quality and yield are seriously affected. Prevention and treatment of the disease from the following aspects: (1) to strengthen the management before deduction shed. Spoon shed enough fertilizer a month ago, raising good roots, nurturing strong seedlings to enhance leeks