32.5％苯甲·嘧菌酯悬浮剂对花生叶斑病的防效

目的]明确32.5%苯甲·嘧菌酯悬浮剂对开封地区花生叶斑病的防治效果。方法]以50%多菌灵可湿性粉剂为对照药剂,于2013、2014年通过小区试验研究32.5%苯甲·嘧菌酯悬浮剂对开封地区花生叶斑病的防治效果及最佳喷药时间。结果]2013年,花生收获前,32.5%苯甲·嘧菌酯悬浮剂2 000倍稀释液对开封地区叶斑病的防效达24.25%,与清水对照相比差异极显著。2014年,在播后65、80 d进行初次喷药的情况下,花生收获前叶斑病防效分别达43.63%、49.7%,与清水对照相比差异极显著。结论]在开封地区,32.5%苯甲·嘧菌酯悬浮剂2 000倍稀释液对花生叶斑病的防效和产量具有较好效果,在播后80 d初次喷药防效较佳。

Control Effect of 32.5 ％ Benzoyl-azoxystrobin SC on Peanut Leaf Spot Disease

Objective] The aim was to evaluate the control effect of 32.5％ benzoyl-azoxystrobin SC against peanut leaf spot disease in Kaifeng.Method] Taking 50％ carbendazim wettable powder as contrast agent,we studied efficacy and optimum applying time of 32.5％ benzoyl-azoxystrobin SC against peanut leaf spot disease through plot test in 2013 and 2014.Result] In 2013,the control effect of 2 000 times of 32.5％ benzoyl-azoxystrobin SC liquid against peanut leaf spot disease was 24.25％ before peanut harvest and reached significant level.In 2014,the control effect was 43.63 ％ and 49.7％ respectively whose first spraying time was 65 days and 80 days after sowing,and the control effect both were very significant than water.Conclusion] In Kaifeng,2 000 times of 32.5％ benzoyl-azoxystrobin SC liquid against peanut leaf spot disease has good effect on efficacy and yield,and it which is firstly sprayed at 80 days after sowing has optimum control effect.