防治侧多食跗线螨的高效药剂筛选

Screening of Highly Effective Pesticides Against Polyphagotarsonemus latus

侧多食跗线螨〔Polyphagotarsonemus latus(Banks)〕是一种重要的农业害螨,区域性为害严重。化学药剂是防控侧多食跗线螨的主要措施,但目前我国针对该螨的登记产品极少。为了筛选获得可用于高效防控侧多食跗线螨的化学药剂,开展了14种常见杀虫剂/杀螨剂常规推荐剂量对该螨的室内药效评价。结果表明,阿维菌素、虫螨腈和联苯菊酯对侧多食跗线螨的速效性高,药后1 d,药效达85%以上,显著高于其他供试药剂;药后3 d,阿维菌素、联苯菊酯和哒螨灵药效较高,超过90%;药后7 d,阿维菌素、联苯菊酯和哒螨灵的药效高达100.00%,虫螨腈、乙基多杀菌素、丁氟螨酯、乙唑螨腈、腈吡螨酯、乙螨唑、氟啶胺和联肼·乙螨的药效超过90%,均表现了良好的持效性。综上,阿维菌素、联苯菊酯、哒螨灵、虫螨腈对侧多食跗线螨防效高,速效性及持效性优良,可与上述其他具有优良持效性的药剂配合及轮换用于田间侧多食跗线螨的化学防控。

The broad mite,Polyphagotarsonemus latus(Banks)is an important spider mite in agriculture causing serious regional damage.Chemical pesticide application is a major measure to control this mite.But,currently there are very few pesticides registered against P.latus in China.In order to screen and obtain chemical pesticides highly effective in controlling P.latus,this experiment conducted indoor efficacy evaluation of 14 common pesticides/acaricides at routine recommended doses on this mite.The results showed that abamectin,chlorfenapyr and bifenthrin had high fast-acting effect against P.latus.The pesticide effect could reach over 85%1 day after pesticide treatment,significantly higher than that of the other testing pesticides.3 days after treatment,the efficacies of abamectin,bifenthrin and pyridaben were higher over 90%.7 days after treatment,the pesticide effects of abamectin,bifenthrin and pyridaben reached high up to 100.00%.The pesticide effects of chlorfenapyr,spinetoram,cyflumetofen,b-azolemiteacrylic,cyenopyrafen,etoxazole,fluazinam and bifenazate·etoxazole were all over 90%,showing favorable persistance.In conclusion,abamectin,bifenthrin,pyridaben and chlorfenapyr have high prevention and control effict on P.latus,and excellent fast-acting and persistent effect.They could be used coordinately or alternatively with the above mentioned fine persistent pesticides for chemical prevention and control of P.latus in fields.