黄瓜霜霉病[Pseudoperonospora cubensis(Berk.et Curt.)Rostov]是气传病害。由于保护地湿度大为害严重,轻者减产10-20％,重者达30％以上,成为生产上的主要问题。我们1989-1990年用7.5％百菌清粉尘和10％百菌清复合粉(中国农科院植保所);10％百菌清烟熏剂(河南安阳农药 Pseudoperonospora cubensis (Berk.et Curt.) Rostov is an airborne disease. As the protection of dampness and damaging serious, the light cut 10-20%, heavy up to 30% or more, become the production of the main problems. In 1989-1990, we used 7.5% chlorothalonil dust and 10% chlorothalonil (Plant Protection Institute of Chinese Academy of Agricultural Sciences), 10% chlorothalonil (Henan Anyang Pesticide