52.5%抑快净防治葡萄霜霉病药效试验

进行52.5%抑快净防治葡萄霜霉病的小区药效试验和大面积示范试验,结果表明：52.5%抑快净水分散粒剂对防治葡萄霜霉病有较好的防治效果,小区试验52.5%抑快净1800倍液、2000倍液第1次药后7 d的防效分别比对照药剂72%霜脲·锰锌可湿性粉剂1500倍液提高11.9、7.0个百分点;第2次药后7 d的防效分别比对照药剂提高17.4、14.1个百分点;大面积示范结果表明：在葡萄霜霉病发生初期及时使用52.5%抑快净水分散粒剂2000倍液进行防治,5d使用1次,连续使用2次,可有效控制葡萄霜霉病的发生蔓延。

Efficacy trial of 52.5% Equation-pro on grape downy mildew

Plot experiment and large-scale demonstration test of 52. 5% Equation-pro on controlling grape downy mildew were conducted,and the results showed that 52. 5% Equation-pro water dispersible granule presented effective control efficacy on grape downy mildew. In the plot experiment,the efficacy of 1800 times,and 2000 times solution of Equation-pro were respectively 11. 9 and 7. 0 percentage points higher than that of 1500 times solution of 72% Cymoxanil·Mancozeb after 7 days of the first application,and 17. 4 and 14. 1 percentage points higher than that of the control after 7 days of the second application. In the large-scale demonstration test,it was effective on controlling grape downy mildew at the initial stage by using2000 times solution of 52. 5% Equation-pro in every 5 days for continuous two times.