[目的]通过室内毒力测定及田间药效试验评价氟啶虫胺腈原药以及22％氟啶虫胺腈悬浮剂对桃树蚜虫的防治效果.[方法]分别采用浸叶法和常规喷雾法进行室内毒力测定和田间药效试验.[结果]室内毒力测定结果表明氟啶虫胺腈和吡虫啉原药对桃蚜48 h LC50值分别为0.9977、5.8498 mg/L,氟啶虫胺腈对桃蚜的相对毒力是吡虫啉的5.86倍.辽宁和陕西田间药效试验结果表明22％氟啶虫胺腈悬浮剂24～48 mg/L对桃蚜防治效果达99.0％以上;山东试验结果表明22％氟啶虫胺腈悬浮剂48 mg/L对桃蚜防效达85.0％以上.[结论]氟啶虫胺腈可有效防治桃蚜,田间分别在露红期和落花后各施药1次,整体的防治效果可持续近1个月的时间.
Laboratory Bioassay and Field Efficacy of Sulfoxaflor Active against Peach Aphid(Myzus persicae)
[Aims] To understand the insecticidal activity of technical sulfoxaflor active and field performance of sulfoxaflor 22％ suspension concentrate (SC) against peach aphid,laboratory bioassay study and field efficacy trials were conducted in Shandong,Liaoning and Shanxi,respectively.[Methods] Laboratory bioassay was conducted by using leaves dipping method and field efficacy trial was carried out by method of foliar application.[Results] Laboratory bioassay results indicated that sulfoxaflor and imidacloprid provided good insecticidal activities to peach aphid and the LC50 values at 48 h were 0.9977 and 5.8498 mg/L,respectively.Sulfoxaflor showed highly potent to peach aphid compared with imidacloprid and the relative toxicity was 5.86.The field efficacy results in Liaoning and Shanxi indicated that sulfoxaflor 22％ SC at application rates of 24-48 mg/L could provide more than 99.0％ efficacy control;in Shandong,sulfoxaflor 22％ SC at application rate of 48 mg/L could provide more than 85.0％ efficacy control.[Conclusions] Sulfoxaflor 22％ SC showed better efficacy control on peach aphid applied at budding stage and after flowering,and the residual control could approximately last for one month.
NETL
NSTL
万方数据
维普
