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  • Title: Mosquito larvicidal activity of Rauvolfia serpentina L. seeds against Culex quinquefasciatus Say.
    Author: Das D, Chandra G.
    Journal: Asian Pac J Trop Med; 2012 Jan; 5(1):42-5. PubMed ID: 22182642.
    Abstract:
    OBJECTIVE: To establish the larvicidal activities, if any of solvent extracts of Rauvolfia serpentina (R. serpentina) L. seeds against Culex quinquefasciatus (Cx. quinquefasciatus) Say, 1823 as target species. METHODS: Seeds of R. serpentina were extracted with five solvents graded according to the polarity [viz. petroleum ether, benzene, ethyl acetate, acetone and absolute alcohol] continuing one after another with the same seeds. RESULTS: Mortality rate with petroleum ether extract was significantly higher than other extracts. The mortality rates of late 3rd instar larvae were 50.33±5.51, 10.00±1.00, 0.00±0.00, 21.33±1.53 and 0.00±0.00 in 100 ppm concentration of petroleum ether, benzene, ethyl acetate, acetone and absolute alcohol respectively, after 24 h of exposure period. CONCLUSIONS: Results of this study show that petroleum ether extract of R. serpentina seed may be considered as a potent source of mosquito larvicidal agent.
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