Effect of Cold Hexane Extract of Karanja (Pongamia Glabra Vent) Seed Kernel on the Development of Mosquito Larvae.
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2009-12
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Abstract
Cold Hexane extract of karanja, Pongamia glabra Vent (Fabaceae) seed
kernel (HKSK) ranging at the concentrations of 4 ppm to 28 ppm
was evaluated against the freshly emerged larvae of Aedes aegypti and
Culex quinquefasciatus. Treatment of HKSK imparted the mortality
that was correlated with the level of dosage. Before pupation,100%
fatality occurred in Ae. aegypti at a concentration of 20 ppm whereas
in Cx. quinquefasciatus the same degree of mortality occurred at the
extract concentration of 12 ppm in the first instar larvae only. At low
doses, the emerging adults of Cx. quinquefasciatus had deformed legs,
wings and truncated abdomen but the adults of Ae. aegypti showed
no deformities. The developmental period was prolonged significantly
in a dose-dependent manner for both the species treated. In
Cx. quinquefasciatus this effect was more pronounced because of
increased intermoult period showing an IGR effect of the extract. The
calculated growth index also decreased in dose-dependent manner
significantly more in Cx. quinquefasciatus. Indeed, Ae. aegypti appeared
more susceptible to HKSK than Cx. quinquefasciatus.
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Sagar S K, Kumar Sarita, Bora D. Effect of Cold Hexane Extract of Karanja (Pongamia Glabra Vent) Seed Kernel on the Development of Mosquito Larvae. Journal of Communicable Diseases. 2009 Dec; 41(4): 249-255.