葡萄霜霉病最初发生在北美洲东部的野生葡萄上。我省是葡萄发展的新区,在六十年代以前,就发现葡萄霜霉病。其突出特点是:野生种(山葡萄)比栽培种容易感病。我省于1963年用山葡萄作砧木嫁接栽培品种成功之后,由于大量繁殖山葡萄砧木苗,因此霜霉病的发生越来越普遍了,尤其是有些年份霜霉病大发生,造成植株提早落叶,枝蔓和芽眼不能成熟。最近几年有逐渐加重的趋势。 Grape downy mildew first occurred on wild grapes in eastern North America. Our province is a new area for grapes development. Before the 1960s, grape downy mildew was discovered. Its salient features are: wild species (mountain grapes) susceptible to disease than cultivated species. In 1963, the province used grapes as the rootstock grafted cultivars successfully, due to the large population of grapevine rootstocks, so the occurrence of downy mildew is more and more common, especially in some years downy mildew occurred, resulting in early leaves deciduous plants, vine And bud eye can not mature. In recent years there is a gradual increase in the trend.