几种药剂防治葡萄霜霉病效果在常年葡萄霉病始发期前（６月１日）用第一次药，后以每隔２０天用药１次，共用药３次。试验结果表明：霜疫必克２００倍液、甲霜灵５００倍液和瑞毒霜加１００倍水进行灌根（每株穴施２公斤），防治葡萄霜霉病效果显著，生产上可大面积推广应... The effect of several agents to control grape downy mildew In the perennial clonal mold onset of the first (June 1) with the first drug, followed by medication once every 20 days, a total of 3 times. The results showed that frostbob 200 times, metalaxyl 500 times and ramula frost plus 100 times water irrigation (2 kg per plant), the effect of controlling grape downy mildew was remarkable, and the production was very big Area promotion should be ...