Larvicidal efficacy of Toddalia asiatica (Linn.) Lam against two mosquito vectors Aedes aegypti and Culex quinquefasciatus

Abstract

The hexane, acetone and methanol extracts of mature fruits and leaves from Toddalia asiatica was investigated to establish its bio-control potentiality under laboratory condition against fourth instars larvae of Dengue vector, Aedes aegypti and Filarial vector, Culex quinquefasciatus. Hexane extract of fruits of T. asiatica showed highest larvicidal activity against both mosquito vector. LC50 value of hexane, acetone and methanol extracts of fruits against A. aegypti were 37.23, 50.69 and 125.55 ppm and against C. quinquefasciatus were 33.23, 82.20 and 215.19 ppm, respectively. Hexane, acetone and methanol extracts of leaves also showed potency against A. aegypti with LC50 values of 133.80, 177.20 and 79.48 and against C. quinquefasciatus with LC50 values of 164.53, 175.28 and 87.87 ppm, respectively .These results suggested that T. asiatica is promising as larvicide against both targeted mosquitoes.