Study of chemical composition and larvicidal efficacy of secondary metabolites from aromatic phytoextracts against dengue vector: Aedes aegypti (Linn) (Diptera: Culicidae)
Author(s): Mamta Goyal, Laxmikant Shinde and Ranjit Bayas
Abstract: Mosquitoes have not only threatened human health but also adversely affect human and wild life as they act as vector for many deadly diseases. Among vector mosquito Aedes aegypti plays a key vector role to transmit viral diseases viz. Dengue, Zika, Yellow Fever and Chikunguniya. The present scenario for vector control strategies exposes the fact of rise in resistance index of mosquitoes against various available synthetic insecticides and also nonresponsive to bacterial larvicides. To overcome these circumstances, more emphasis should be given to bio-control strategies using secondary metabolites from plant extracts; since, they are enriched in bioactive components with larvicidal activity. Present study analyzed chemical composition and larvicidal efficacy of flowers of Gliricidia sepium and seeds of Annona squamosa in methanolic and hexane extracts. The bioassay for larvicidal activity was carried out using II, III, IV instar larvae of Aedes aegypti. It was observed that early instar stages showed more sensitivity to EOs as compared to later immature developing stages. The lowest LC50 values shown by second, third, fourth instar larvae in methanol extract of Gliricidia sepium as 38.01ppm, 45.65 ppm, 60.25 ppm respectively whereas highest LC50 values against II, III, IV instar larvae of Aedes aegypti were 77.62 ppm, 95.40 ppm, 128.82 ppm respectively in hexane extract of Annona squamosa. EOs of Gliricidia sepium can be used as an effective biolarvicide to control mosquitoes as environment friendly solution.
Chromatogram-showing GC-MS profile of essential oil obtained from seeds of Annona squamosa in
How to cite this article:
Mamta Goyal, Laxmikant Shinde, Ranjit Bayas. Study of chemical composition and larvicidal efficacy of secondary metabolites from aromatic phytoextracts against dengue vector: Aedes aegypti (Linn) (Diptera: Culicidae). Int J Mosq Res 2019;6(1):26-33.