防治黄瓜白粉病，生产上常用甲基托布津防治。为了进一步摸索新的有效药剂品种，唐山新区科协进行了粉锈宁防治露地黄瓜白粉病的药效试验。获得了良好效果。试验用药剂为２０％粉锈宁可湿性粉剂、５０％甲基托布津，各分两个浓度，粉锈宁为４００PPm和６００PPm（毫升／公斤） Control cucumber powdery mildew, the production of methyl thiophanate prevention and treatment. In order to further explore the new effective varieties of pesticides, Tangshan New District Association for the efficacy of triadimefon to control open-field cucumber powdery mildew test. Get good results. The test agents were 20% triadimefon wettable powder and 50% thiophanate-methyl, each in two concentrations. Trimethoprim was 400PPm and 600PPm (ml / kg)