Toxicity effect of Cassia fistula linn. and Gliricidia sepium Jacq. leaf extract against the fourth instar larvae of filarial mosquito, Culex quinquefasciatus Say. (diptera: culicidae)

The filarial mosquito Culex quinquefasciatus is mainly associated with the spread of filarial worm, Wuchereria bancrofti that causes filariasis or elephantiasis in human beings. In the present investigation the efficacy of the methanolic leaf extracts of Cassia fistula and Gliricidia sepium on the fourth instar larvae of C. quinquefasciatus was carried out. Both botanicals showed larvicidal effect but the efficacy of C. fistula was greater than that of G. sepium.