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International Journal of Mosquito Research
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International Journal of Mosquito Research
Vol. 8, Issue 4, Part A (2021)

Studies on efficacy of two botanical repellents, Zanthoxylum rhetsa and Amorphophalus sylvaticus against Culex quinquefasciatus

Author(s): CR Hima and M Manimegalai
Abstract: A laboratory study was conducted to evaluate the repellent activity of Zanthoxylum rhetsa and Amorphophalus sylvaticus against the adult mosquitoes of culex quinquefasciatus. The ethanolic fruit extract of Zanthoxylum rhetsa at 100, 200, 300, 400 and 500 ppm offered 26, 46.8, 77, 90.9 and 100 percentage protection against mosquito bite during the time 5-6 p.m. The percentage protection against the mosquito bite was 29, 48, 74, 91 and 100 at 100, 200, 300, 400 and 500 ppm when treated with corm extract of Amorphophalus sylvaticus. Both of the results showed maximum percentage of protection in higher concentration (500 ppm) and minimum percentage of protection in lower concentration (100 ppm) during the time 5-6 pm, 6-7 pm, 7-8 pm and 8-9 pm respectively. After the smoke exposure of Zanthoxylum rhetsa coil the adult mortality of Culex mosquitoes was 54.4% where as in negative control (without plant ingredients) it was 0% and in the case of positive control (synthetic coil) it was 50.80%. In the case of Amorphophalus sylvaticus coil the adult mortality noticed after smoke exposure was 57.6% where as in negative control (without plant ingredients) it is 0% and in the case of positive control (synthetic coil) it was 50.8%. From the above results it is clear that both Zanthoxylum rhetsa and Amorphophalus sylvaticus possess good smoke toxic effect and they can be used as effective repellents against mosquitoes.
Pages: 06-10  |  21 Views  3 Downloads
How to cite this article:
CR Hima, M Manimegalai. Studies on efficacy of two botanical repellents, Zanthoxylum rhetsa and Amorphophalus sylvaticus against Culex quinquefasciatus. Int J Mosq Res 2021;8(4):06-10.
International Journal of Mosquito Research