霜霉病是各类温室、大棚黄瓜发生最普遍,危害最严重的病害,对黄瓜的产量和品质影响很大。常规农药喷雾法施药,不但费工费时,而且增加了棚内湿度,可能诱发和加速病害的发展。烟雾法虽能避免上述问题的发生,但烟雾极易散失,从而降低防效。去年,我们使用粉尘法防治大棚和温室黄瓜 Downy mildew is all kinds of greenhouses, greenhouse cucumbers occur most commonly, the most serious damage to the disease, a great impact on the yield and quality of cucumber. Conventional pesticide spray method applied, not only time-consuming work, but also increased shed humidity, may induce and accelerate the development of the disease. Although the smoke law to avoid the above problems, but the smoke easily dispersed, thus reducing the control effect. Last year, we used dust control greenhouse and greenhouse cucumber