大棚韭菜疫病及灰霉病的防治大棚韭菜的生产是在春季，此时棚内温度较低且湿度很大，致使疫病和灰霉病发生比较严重。造成韭菜叶片枯死或腐烂。不但影响产量，也严重降低了韭菜的品质。为了增加菜农的收入和早春市场供应，必须加强防治韭菜疫病和灰霉病。一、韭菜疫病（一... Greenhouse leek disease and gray mold prevention and control Greenhouse leek production is in the spring, when the greenhouse temperature is lower and humidity is very high, resulting in epidemic and gray mold disease more serious. Leek leaves cause death or decay. Not only affect the yield, but also seriously reduce the quality of leeks. In order to increase incomes of farmers and market supply in early spring, we must step up prevention and control of chives disease and gray mold disease. First, the chives disease (a ...