Repellent and mosquitocidal effects of leaf extracts of Clausena anisata against the Aedes aegypti mosquito (Diptera : Culicidae)

摘要: Mosquitoes are rapidly developing resistance to insecticides that millions of people relied on protect themselves from the diseases they carry, thereby creating a need develop new insecticides. Clausena anisata is used traditionally as an insect repellent by various communities in Africa and Asia. For this study, repellency adulticidal activities leaf extracts compounds isolated plant species were evaluated against yellow fever mosquito, Aedes aegypti. In topical application assays, using total bites indicator, was dose dependent, with acetone crude extract (15 %) having 93 % repellence hexane fraction (7.5 %) 67 % after 3 h. Fractionation resulted loss repellence. As mosquito-net treating agents, C. anisata, both at 15 %, had average repellences 46.89 ± 2.95 50.13 ± 2.02 %, respectively, 3 h exposure. The its caused mosquito knockdown eventually death when nebulised into testing chamber, EC50 78.9 mg/ml (7.89 %) 71.6 mg/ml (7.16 %) first 15 min spraying. have potential be included protection products mosquitoes due cidal contained therein.