Larvicidal and repellent efficacy evaluation of Calotropis procera against Aedes aegypti Linn and Culex quinquefasciatus (Diptera: Culicidae) mosquito species under laboratory condition

Abstract

To evaluate the larvicidal efficacy of methanol extract of Calotropis procera the experiments were conducted against larvae of Aedes aegypti and Culex quinquefasciatus mosquito species. Third instar larvae of selected mosquitos species were exposed to various concentrations (50-200 ppm) and were evaluated in the laboratory. The morality observation of exposed larvae was recorded at 24 hrs. After treatment. LC values of the Calotropis procera leaf extract was determined following Probit analysis. The LC50 and LC90 values of Calotropis procera against Aedes aegypti and Culex quinquefasciatus larvae were recorded as 67.01, 95.92 and 138.49, 213.17 ppm, respectively. The Dhoop candle containg active ingredient Calotropis procera exhibited 80.00% and 67.92% repellency against Aedes aegypti and Culex quinquefasciatus mosquitoes, respectively. From the results it can be concluded the crude extract and Dhoop candle incorporating Calotropis procera offers an excellent potential for controlling and as well as repelling Aedes aegypti and Culex quinquefasciatus mosquitoes.