葡萄霜霉病是葡萄生产上的一种重要病害。我省各葡萄产区普遍发生,为害严重。结果树和幼苗受害最重。发生后常造成叶片枯黄,早期脱落,枝条不充实,影响幼苗安全越冬。严重时,还可造成大量死苗。据1983～1984年在熊岳地区调查,病叶率高达100％,严重度为95.3～96.5％,严重地块死苗率10～15％。因此,我们从1983年开始至1986年进行了防治研究。 Grape downy mildew is an important disease in grape production. Grape production areas in our province generally occur, serious damage. Trees and seedlings are the hardest hit. Often caused after the leaves yellow, early fall off, inadequate branches, affecting the safety of seedlings wintering. Serious, can also cause a large number of dead seedlings. According to the survey conducted in Xiong Yue district from 1983 to 1984, the diseased leaf rate reached as high as 100% with a severity of 95.3% to 96.5% and a severe blockage rate of 10-15%. Therefore, we started the prevention and treatment study from 1983 to 1986.