黄瓜、白菜、啤酒花、葡萄等经济作物霜霉病是生产中的重要病害,常因霜霉病流行减产40—50%。1979年内蒙古的包头、呼和浩特地区酒花霜霉病大发生,减产达80%。对霜霉病,早在100多年前,人们就开始应用波尔多液来防治。此后又创制了诸如代森、福美类有机杀菌剂。然而,上述有机或无机杀菌剂均属保护剂,对霜霉病的防效只有50%左右。随着我国化学工业的发展,到七十年代中后期,我国生产出具有防治兼备、高效、低毒、能上下传导的内吸杀菌剂一霜疫净(抑霉灵等)。据我所和上海农药研究所,沈 Cucumber, cabbage, hops, grapes and other cash crops, downy mildew is an important disease in production, often due to downy mildew epidemic 40-50%. In 1979 Baotou, Inner Mongolia, Hohhot hop downy mildew occurred, cut 80%. Downy mildew, as early as 100 years ago, people began to use Bordeaux mixture to control. Since then created such as Desen, the United States and the United States category of organic fungicides. However, the above organic or inorganic fungicides are protective agents, and the control effect on downy mildew is only about 50%. With the development of China’s chemical industry, by the mid-to-late 1970s, our country produced a systemic antifungal agent (antimycopper, etc.) that has both control and prevention, high efficiency, low toxicity and can be conducted up and down. According to my institute and Shanghai Institute of Pesticide, Shen