Efficacy of plant extracts against the larvae of filariasis vector, culex quinquefasciatus say and the dengue vector aedes aegypti linn at Mysore

Kumuda, S. S. and Mohan Kumar, T. K. and Prathibha, K. P. and Vijayan, A. V. (2015) Efficacy of plant extracts against the larvae of filariasis vector, culex quinquefasciatus say and the dengue vector aedes aegypti linn at Mysore. International Journal of Current Microbiology and Applied Sciences, 4 (6). pp. 242-249. ISSN 2319-7706

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Abstract

Mosquito control has been facing backlashes because of the emergence of resistant varieties against synthetic insecticides. Hence biologically active environment friendly insecticides of plant origin have received renewed attention in recent years as agents for vector control. The present investigation highlights the larvicidal efficacy of petroleum ether, chloroform, ethyl acetate, methanol and acetone extracts of Heracleum rigens seeds against 2nd, 3rd and 4th instar larvae of the laboratory reared Culex quinquefasciatus and Aedes aegypti. The larval susceptibility tests were conducted following the WHO standard procedure (WHO, 2005). The LC50 values of Heracleum rigens for Culex quinquefasciatus and Aedes aegypti respectively are 7.19 and 40.64 ppm against 2nd instar; 24.80 and 91.55 ppm against 3rd instar and 69.25 and 113.69 ppm against 4th instar larvae. The results suggest that 2nd instar larvae were significantly susceptible compared to 3rd and 4th instar larvae and that Heracleum rigens may contain promising larvicides against different mosquito species.

Item Type: Article
Uncontrolled Keywords: Aedes Aegypti and Culex Quinquefasciatus and Efficacy and Heracleum Rigens and Larvicide and Susceptible
Subjects: B Life Science > Zoology
Divisions: Department of > Zoology
Depositing User: Shrirekha N
Date Deposited: 04 Jul 2019 05:32
Last Modified: 04 Jul 2019 05:32
URI: http://eprints.uni-mysore.ac.in/id/eprint/4582

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