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[目的]研究25%嘧菌酯悬浮剂对黄瓜霜霉病的防效。[方法]试验设空白对照和25%嘧菌酯悬浮剂450、600、750 g/hm2以及80%代森锰锌可湿性粉剂300 g/hm2 5个处理,于2012、2013连续2年开展了25%嘧菌酯悬浮剂防治黄瓜霜霉病田间药效试验。[结果]25%嘧菌酯悬浮剂对黄瓜霜霉病有较高的防治效果,其防效为70.0%~83.6%,使用时推荐剂量为25%嘧菌酯悬浮剂600 g/hm2,于黄瓜霜霉病发病前或初开始喷药,间隔7 d喷一次药,共喷药3次。[结论]该研究可为25%嘧菌酯悬浮剂在生产上的推广应用提供理论依据。
[Objective] The research aimed to study the control effect of 25% azoxystrobin on cucumber downy mildew. [Method] Five treatments of blank control, 25% azoxystrobin suspension at 450, 600 and 750 g / hm2, and 80% Mancozeb WP at 300 g / hm2 were tested in two consecutive years in 2012 and 2013 Effect of 25% Azoxystrobin in Controlling Cucumber Downy Mildew in Field. [Result] The 25% azoxystrobin suspension had higher control effect on cucumber downy mildew, the control effect was 70.0% ~ 83.6%, and the recommended dosage was 25% azoxystrobin 600 g / hm2 when used Cucumber downy mildew onset before or at the beginning of spraying, an interval of 7 d spraying a total of 3 times spraying. [Conclusion] This study could provide a theoretical basis for the popularization and application of 25% azoxystrobin in production.