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International Journal of Mosquito Research
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International Journal of Mosquito Research
Vol. 1, Issue 4, Part A (2014)

Mosquitocidal activity of Polygala arvensis Willd against Aedes aegypti (Linn.), Anopheles stephensi (Liston.) and Culex quinquefasciatus (Say.) (Diptera: Culicidae)

Author(s): M. Deepa, K. Palanisamy, K. Krishnappa and K. Elumalai
Abstract: To determine the larvicidal, ovicidal and repellent activities of benzene and methanol extract of Polygala arvensis against Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus Twenty five 3rd instar larvae of selected mosquitoes species were exposed to various concentrations (60-300 ppm) and were assayed in the laboratory by using the protocol of WHO 2005; the 24 h LC50 values of the P. Arvensis leaf extract was determined following Probit analysis. The ovicidal activity was determined against Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus exposed to various concentrations were tested under laboratory conditions and the hatch rates were assessed 120hrs post treatment. The repellent efficacy was determined against selected mosquitoes at three concentrations viz., 1.0, 2.0 and 3.0 mg/cm2 under the laboratory conditions. The LC50 and LC90 values of benzene and methanol extract of P. arvensis against Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus larvae in 24 h were 75.32, 88.26, 82.46, 58.21, 46.37, 42.68 and 260.48, 275.26, 251.39, 208.45, 189.82 and 130.44 ppm, respectively. It has been noticed that the higher concentrations of P. arvensis extracts possesses strong ovicidal activity at 200 ppm concentration against Ae. aegypti, An. stephensi and C. quinquefasciatus, no egg hatchability was recorded. In the same way, methanol extracts showed maximum ovicidal activity followed by benzene extract against selected vector mosquitoes. In repellent activity, among two extracts tested P. arvensis methanol extract had strong repellent action against selected mosquitoes as it provided 100% protection against Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus for 280min. From the results it can be concluded the P. arvensis extract was an excellent potential for controlling Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus mosquitoes.
Pages: 30-34  |  816 Views  11 Downloads
How to cite this article:
M. Deepa, K. Palanisamy, K. Krishnappa and K. Elumalai. Mosquitocidal activity of Polygala arvensis Willd against Aedes aegypti (Linn.), Anopheles stephensi (Liston.) and Culex quinquefasciatus (Say.) (Diptera: Culicidae). International Journal of Mosquito Research. 2014; 1(4): 30-34.
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