作　　者： ; ; ; ;

机构地区： 华南农业大学

出　　处： 《华南农业大学学报》 2014年第1期64-68,共5页

摘　　要： 【目的】在前期研究基础上,系统评价羽裂蟹甲草Cacalia tangutica的杀虫活性.【方法】采用触杀、胃毒和点滴等方法测定了羽裂蟹甲草中9种化学成分对家蝇Musca domestica、致倦库蚊Culex pipiens quinquefasciatus、菜粉蝶Pieris rapae、亚洲玉米螟Ostrinia furnacalis、红火蚁Solenopsis invicta的生物活性.【结果和结论】无羁萜对家蝇3龄幼虫的触杀活性明显,1μg/头点滴处理后48 h,校正死亡率达到86.18%,与鱼藤酮(85.67%)无显著差异.无羁萜和山奈酚对致倦库蚊4龄幼虫的毒杀活性与鱼藤酮不显著,处理后72 h,校正死亡率均超过80%.此外,无羁萜对菜粉蝶3龄幼虫、亚洲玉米螟4龄幼虫、红火蚁表现出了一定的触杀活性,无羁萜、槲皮素和山奈酚对红火蚁还具有较明显的胃毒活性.结果表明无羁萜、槲皮素、山奈酚是羽裂蟹甲草中的活性成分. [ Objective ] To assess the insecticidal activities of Cacalia tangutica based on previous resear- ches. [ Method ] The activities of several compounds from Cacalia tangutica against Musca domestica, Culex pipiens quinquefasciatus, Pieris rapae, Ostrinia furnacalis, Solenopsis invicta were bioassayed by contact, stomach poison and drop treatment. [ Result and conclusion ] The results indicated that friedelin possessed a strong contact toxicity against third-instar larvae of M. domestica, and the corrected mortality was 86. 18% after treatment for 48 h with 1 p,g each larva by topical application, which was not signifi- cantly different from that of rotenone（85.67% ）. Friedelin, kaempferol and rotenone were equitoxic to fourth-instar larvae of C. pipiens quinquefasciatus. The corrected mortalities after treatment for 72 h were more than 80%. Moreover, friedelin had some degree of contact toxicities against third-instar larvae of P. rapae, fourth-instar larvae of O. furnacalis and S. invicta. Friedelin, quercetin and kaempferol had obvious stomach poison activities to S. invicta. Generally friedelin, quercetin and kaempferol are the ac- tive ingredients of C. tangutica.

关 键 词： 羽裂蟹甲草 化学成分 杀虫活性

领　　域： [农业科学] [农业科学]