烯啶虫胺、醚菊酯及其混剂对褐飞虱的毒力测定  

Toxicity of nitenpyram, ethofenprox and their mixtures on Nilaparvata lugens

作　　者：凌炎[1] 钟勇[2] 韦淑丹[2] 尹文兵[2] 龙丽萍[3] 

机构地区：[1]广西农业科学院植物保护研究所 [2]广西大学农学院,南宁530005 [3]广西农业科学院水稻研究所,南宁530007

出　　处：《南方农业学报》2011年第8期906-909,共4页Journal of Southern Agriculture

基　　金：国家公益性行业(农业)科研专项项目(200803003);国际科技合作计划项目(2009DFA30810);国家自然科学基金项目(31060247,30560084);广西青年科学基金项目(桂科青0991057);广西自然科学基金项目(2010GXNSFA013100,桂科自0640051);水稻重大病虫害抗药性监测与安全用药项目(2006);广西农业科学院基本科研业务专项项目[200830(基)]

摘　　要：【目的】了解烯啶虫胺、醚菊酯单剂及其混剂对褐飞虱3龄若虫的毒力作用,为开发防治褐飞虱的复配制剂提供科学依据。【方法】用稻茎浸渍法测定烯啶虫胺、醚菊酯单剂及其混剂对褐飞虱的毒力效果。【结果】烯啶虫胺、醚菊酯对褐飞虱3龄若虫的LC50分别为0.4922和9.1847mga·i·L-1,两单剂按有效成分质量比为1∶12和1∶27(烯啶虫胺∶醚菊酯)时,共毒系数分别为249.89和138.15。【结论】烯啶虫胺和醚菊酯按有效成分质量比为1∶12和1∶27(烯啶虫胺∶醚菊酯)时有明显的增效作用。[Objective]The present experiment was conducted to study the toxic effects of nitenpyram, ethofenprox and their mixtures on Nilaparvata lugens, and to provide scientific basis for developing chemical pesticide for its control. [Method]The toxic effects of nitenpyram, ethofenprox and their mixtures on N. lugens were determined by using rice stem dipping method. [Result]The values of LC50 for nitenpyram, etofenprox on the 3rd nymph of Nilaparvata lugens were recorded as 0.4922 and 9.1847 mg a·i·L-1, respectively. When the efficiency mass ratio of the two single insecticides was 1∶12 and 1∶27 （Nitenpyram∶Etofenprox）, the co-toxicity coefficients （CTC） were 249.89 and 138.15, respectively. [Conclusion]The data revealed that combined mixture of two insecticides in the ratioes of 1∶12 and 1∶27 （Nitenpyram∶Etofenprox） gave excellent synergistic effect.

关 键 词：烯啶虫胺 醚菊酯 褐飞虱 毒力 

分 类 号：S482.3[农业科学—农药学]