黄瓜霜霉病[Pseudoperonospora cubensis(Berk et Curt)Rostov]是元谋冬黄瓜上的主要病害之一。近年来发生普遍、危害严重。一般病株率30～40％,严重田块病株率可达80％以上,个别田块甚至无收。提早拉蔓,是元谋冬黄瓜高产稳产的一大威胁,本文系1986～1990年冬黄瓜霜霉病发生规律及防治研究总结。 Pseudoperonospora cubensis (Berk et Curt) Rostov is one of the major diseases on cucumber in Yuanmou. In recent years, widespread, serious harm. The general strain rate of 30 to 40%, severe field disease rate of up to 80% of the individual plants, or even crop failure. Early Laman, Yuanmou winter cucumber yield is a big threat to a high yield, this article from 1986 to 1990 winter cucumber downy mildew disease occurrence and prevention and treatment summary.