不同杀虫剂对苹果黄蚜的田间防控效果

目的]探讨8种不同类型杀虫剂对苹果黄蚜的防治效果,为苹果黄蚜的防治提供参考。方法]通过田间小区试验比较了4.9%双丙环虫酯可分散液剂、10%氟啶虫酰胺悬浮剂、22%螺虫乙酯·噻虫啉悬浮剂、22.4%螺虫乙酯悬浮剂、480 g/L噻虫啉悬浮剂、22%氟啶虫胺腈悬浮剂、20%啶虫脒可溶性粉剂、10%吡虫啉可湿性粉剂8种药剂对苹果黄蚜的防治效果。结果]8种药剂对苹果黄蚜的防治效果差异显著,其中48%噻虫啉悬浮剂8 000倍液、22%螺虫乙酯·噻虫啉悬浮剂4 000倍液和22%氟啶虫胺腈悬浮剂8 000倍液能有效控制苹果黄蚜危害,且速效作用好,持效期长达14 d,药后1~14 d对苹果黄蚜的防治效果均在90%以上;22.4%螺虫乙酯悬浮剂4 000倍液对苹果黄蚜速效性较差,药后1和3 d的防治效果均低于78%,但持效性较显著,药后7~14 d的防治效果为93.9%~97.2%;4.9%双丙环虫酯可分散液剂15 000倍液药后1 d的防治效果低于78%,但其持效性较显著,药后3~14 d的防治效果均在85%以上;10%氟啶虫酰胺悬浮剂3 333倍液药后1 d的防治效果低于62%,但药后3~7 d的防治效果均在93%以上,之后防效逐渐递减。10%吡虫啉可湿性粉剂1 500倍液和20%啶虫脒可溶性粉剂2 500倍液对苹果黄蚜的防治效果速效性和持效性均较差,药后1 d的防治效果低于78%,药后10~14 d的防治效果低于72%。结论]在苹果安全生产中,建议轮换使用48%噻虫啉悬浮剂8 000倍液、22%螺虫乙酯·噻虫啉悬浮剂4 000倍液和22%氟啶虫胺腈悬浮剂8 000倍液防治苹果黄蚜。

Field Efficacy of Several Insecticides on Aphis citricola van der Goot

Objective] The aim was to study the field efficacy of several insecticides on Aphis citricola van der Goot to provide reference for the control of Aphis citricola van der Goot.Method] 8 pesticides were used for the investigation of the control effects against Aphis citricola van der Goot in field.Result] There were significant differences on the control effect among the 8 tested pesticides.Among them,8 000 times liquid of 48％ thiamethoxam SC,4 000 times liquid of 22％ spirotetramat · thiamethoxam SC and 8 000 times liquid of 22％ clothianidin SC had excellent and quick control effect,with the control efficacy of more than 90％ at 1-14 days after treatment (DAT).22.4％ spirotetramat SC had poor fast-acting property with the controlling effect of less than 78％ at 1 DAT and 3 DAT,while it had good persistence with the control efficacy of 93.9％-97.2％ at 7-14 DAT.The controlling effect of 15 000 times liquid of 4.9％ afidopyropen DC were less than 78％ at 1 DAT,while it had good persistence with the control effect of more than 85％ at 3-14 DAT.The controlling effect of 10％ flunicotamid SC were less than 62％ at 1 DAT,and the controlling effect were more than 93％ at 3-7 DAT,and then the effect was decreased with time.3 300 times liquid of 10％ imidacloprid WP and 25 000 times liquid of 20％ acetamiprid SP had poor fast-acting property and persistence,the controlling effect were less than 78％ at 1 DAT,and less than 72％ at 10-14 DAT.Conclusion] These results suggested that the rational applications of 8 000 times liquid of 48％ thiamethoxam SC,4 000 times liquid of 22％ spirotetramat · thiamethoxam SC and 8 000 times liquid of 22％ clothianidin SC could be recommended for controlling Aphis citricola van der Goot in apple production.