5种环境友好杀虫剂对MEAM1烟粉虱隐种的药效评价

Control Effect Evaluation of Five Environmental-friendly Insecticides against Bemisia tabaci MEAM1 Cryptic Species

【目的】筛选对新疆MEAM1烟粉虱隐种高效、低毒的环境友好杀虫剂,预防和控制烟粉虱传播的番茄黄化曲叶病毒病危害,为安全防治烟粉虱提供科学依据。【方法】在喀什地区麦盖提县烟粉虱发生期,采用喷雾施药法,5种环境友好杀虫剂对设施番茄MEAM1烟粉虱隐种的田间药效并进行评价。【结果】施药后7 d,供试的5种杀虫剂对MEAM1烟粉虱隐种效果最佳,60 g/L乙基多杀菌素悬浮剂、50%吡蚜酮水分散粒剂、30%噻虫嗪种子处理悬浮剂、20%啶虫脒可湿性粉剂、50%氟啶虫胺腈水分散粒剂田间防效依次为96%、94%、93%、93%、92%;至施药后14 d,药效降低显著,仅达50%左右。【结论】5种杀虫剂对MEAM1烟粉虱隐种的防治效果均较好,对番茄安全,可以作为防治设施番茄MEAM1烟粉虱隐种的推荐药剂;从各药剂的毒性、速效性比较,在设施番茄生产上优先推荐60 g/L乙基多杀菌素悬浮剂和50%吡蚜酮水分散粒剂交替使用,每个生长季使用不超过2次,以延缓烟粉虱抗药性的产生。

[ Objective]The aim of the study focuses on selecting high efficiency and low toxicity insecticides to provide scientific basis for the safety control of Bernisia tabaci MEAM1 Cryptic species and preventingand controling tomato yellow leaf curl virus disease transmitted by Bemisia tabaci. [ Methods ] The control effects of 5 environmental -friendly insecticides against Bemisia tabaci MEAM1 Cryptic species were evaluated in field using foliar spraying. [ Result ] All tested insecticides, 60 g/L spinetoram WG, Pymetrozine 50% WDG, thiamethoxam 30% WG, acetamiprid 5% WP, sulfoxaflor 50% WDG, showed high effect against Bemisia tabaci MEAM1 Cryptic species at 7 d;The control effect was 96%, 94%, 93%, 93%, and 92%, respectively. 14 days after application, the control effect sharply decreased to 50%. [ Conclusion] This 5 insecticides could be recommended to control Bemisia tabaci for tomato production in greenhouses. In the comparison of the toxicity and rapid control effect, 60 g/L spinetoram WG and Pymetrozine 50% WDG were considered the best options, however, the application was limited in no more than two times in each growing season to delay the resistance of Bemisia tabaci.