In order to find a combination formulation with fast speed, long persistence and low cost against grape downy mildew, solve the resistance to downy mildew, and help farmers to reduce the costs for using pesticides, we carried out comparative tests on azoxystrobin + mancozeb 70% WP controlling downy mildew on grape. The results showed that when using 45 kg water in 667 m2, the best control efficiency for azoxystrobin + mancozeb 70% WP 1 125 g/hm2 against grape downy mildew was 76.36%, slightly better than the best control effect for 250 g/L pyraclostrobin EC 360 mL/hm2, and significantly better than the best control efficacy for 25% azoxystrobin SC 450 mL/hm2 and 50% dimethomorph WP 900 g/hm2. From the demands of farmers and market, the complex combination is worth vigorously promoting.%为了寻找一种对葡萄霜霉病速效、持效、价廉的复配制剂,解决抗性霜霉病的防治问题,并且帮助农户降低用药成本,进行了70％嘧菌·锰锌WP防治葡萄霜霉病大面积田间药效对比试验.结果表明,在667m2用水量45 kg情况下,施用70％嘧菌·锰锌WP 1 125 g/hm2对葡萄霜霉病最佳防效达到76.36％,略优于250 g/L吡唑醚菌酯EC 360 mL/hm2的最佳防效,显著优于25％嘧菌酯SC 450 mL/hm2和50％烯酰吗啉WP 900 g/hm2的最佳防效.70％嘧菌·锰锌WP可以从多方面基本满足农户和市场的需求,是个值得大力推广的复配产品.
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