Bioactivity of ethanol extract of Karanja (Pongamia glabra vent) seed coat against mosquitoes.

Laboratory evaluation revealed that the treatment of larvae of Aedes aegypti and Culex quinquefasciatus with ethanol extract of karanja seed coat (ALKSC) significantly increased the larval mortality and developmental period proportianately with increase in the extract concentrations. Aedes proved more sensitive to the effect of extract in terms of mortality than Culex. At a high concentration (8 ppm), 100% Aedes larvae died in the first instar within two days whereas, 16 pmm was required for achieving the same level of mortality in Culex. Culex was also found more sensitive than Aedes regarding IGR effect. In emerging Culex pupae several abnormalities were observed while Aedes pupae did not exhibit any abnormalities. However larvae which pupated successfully resulted in adults with several structural abnormalities in both the species.