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为了研究75%精甲霜灵·霜脲氰水分散性颗粒剂(WG)喷雾防治葡萄霜霉病的应用效果,进行了田间药效试验。结果表明:75%精甲霜灵·霜脲氰水分散性颗粒剂按250 g/hm2、187.5 g/hm2和125 g/hm2施药后的防效分别为89.82%、67.31%和58.87%,对照药剂为250 g/L醚菌酯悬浮剂187.5 g/hm2,防效为78.94%;供试药剂3个施药浓度间差异显著,可见,应用75%精甲霜灵·霜脲氰WG防治当地葡萄霜霉病有推广价值。
In order to study the application effect of 75% metalaxyl-urea-urea dispersible granules (WG) spray to control grape downy mildew, a field efficacy test was conducted. The results showed that the control effects of 75% dextrose and cream urea dispersible granules were 89.82%, 67.31% and 58.87%, respectively at the rates of 250 g / hm2, 187.5 g / hm2 and 125 g / hm2, The control agent was 250 g / L of ketorolac suspension at 187.5 g / hm2, and the control effect was 78.94%. There were significant differences among the three tested concentrations of the tested pesticides. It can be seen that the application of 75% Metalaxyl / Local grape downy mildew has promotional value.