白粉病是日光温室黄瓜栽培重要病害之一。由于日光温室内温度高,湿度适宜,极有利于黄瓜白粉病的发生与流行。一般情况下,栽培后期白粉病株发病率达65%～100%,叶发病率为50%～70%,发病指数为15～40。武山县日光温室黄瓜种植面积较大,年 Powdery mildew is one of the important diseases of cucumber cultivation in sunlight greenhouse. Due to the high temperature in the greenhouse, the humidity is appropriate, very conducive to the occurrence and prevalence of cucumber powdery mildew. Under normal circumstances, the incidence of powdery mildew in late cultivation of 65% to 100%, leaf incidence of 50% to 70%, the incidence index of 15 to 40. Wushan County greenhouse greenhouse cucumber planting area larger