alexa Abstract | Comparative analysis of larvicidal activity of essential oils of Cymbopogon flexeous (Lemon grass) and Tagetes erecta (Marigold)against Aedes aegypti larvae

European Journal of Experimental Biology
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Research Article Open Access

Abstract

In view of the recently increased interest in developing plant origin insecticides as an alternative to chemical
insecticide, this study was undertaken to assess the larvicidal potential of the essential oil Cymbopogon flexeous (lemongrass) and Tagetes erecta (marigold) against medically important mosquito vector, Aedes aegypti. Essential oil was hydro distilled in the laboratory from the plants obtained from the CAP. Bioefficacy of the essential oil was evaluated under laboratory conditions using III instar mosquito larvae. The LC50 values of Cymbopogon flexeous are 136.8, 52.736 and 24.056ppm after 12, 24 and 48 h of exposure respectively. The LC50 values of Tagetes erecta are 81.765, 48.951 and 17.729ppm after 12, 24 and 48 hours of exposure respectively. Chi-square values were significant at p<0.05 level. The essential oil of Cymbopogon flexeous found effective to control the larvae. Such findings would be useful in promoting research aiming at the development of new agent for mosquito control based on bioactive chemical compounds from indigenous plant sources as an alternative to chemical larvicides

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Author(s): Beena Joshi Bhatt

Keywords

Essential oils, Aedes aegypti, Lethal concentration, Probit analysis, Relative potency

 
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