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Agastian, P.
- Egg Hatchability and Larvicidal Activity of Swertia chirata Buch. - Hams. ex Wall. against Aedes aegypti L. and Culex quinquefasciatus Say
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Authors
Affiliations
1 Entomology Research Institute, Loyola College, Chennai-600 034, IN
2 Department of Plant Biology and Biotechnology, School of Life Sciences, Loyola College, Chennai-600 034, IN
1 Entomology Research Institute, Loyola College, Chennai-600 034, IN
2 Department of Plant Biology and Biotechnology, School of Life Sciences, Loyola College, Chennai-600 034, IN
Source
Indian Journal of Science and Technology, Vol 2, No 12 (2009), Pagination: 46-49Abstract
Crude Swertia chirata extracts (hexane, ethyl acetate&methanol) were tested for egg hatchability and larvicidal activity against two vector mosquitoes, Aedes aegypti and Culex quinquefasciatus. The lowest egg hatchability was recorded at 1000 ppm of ethyl acetate extract which showed 12.6, 20.4 and 25.4 % at 0-6, 6-12 and 12-18 h respectively against Cx. quinquefasciatus; it was 11.4, 17.8 and 23.4 % at 0-6, 6-12 and 12-18 h respectively against Ae. aegypti. The LC50 values for the larvicidal activity of ethyl acetate extract of S. chirata against first, second, third and fourth instar larvae of Cx. quinquefasciatus were 164.91, 220.10, 284.05 and 326.46 ppm and against Ae. aegypti 192.67, 237.30, 339.06 and 329.29 ppm respectively.Keywords
Swertia Chirata, Culex Quinquefasciatus, Aedes Aegypti, Egg Hatchability, Larvicidal ActivityFull Text
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