Larvicidal activity of Wrightia tinctoria R. BR. (Apocynaceae) fruit and leaf extracts against the filarial vector Culex quinquefasciatus Say (Diptera: Culicidae) |
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| Affiliation: | 1. King Institute of Preventive Medicine and Research, Chennai 600 032, Tamil Nadu, India;2. Department of Zoology, Madras Christian College, Chennai 600 059, Tamil Nadu, India;3. Department of Zoology, Thiruvalluvar University, Vellore 632 115, Tamil Nadu, India;1. Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;2. Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;3. Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;1. Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran;2. Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;3. Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran;4. Iranian Research Center for HIV/AIDS (IRCHA), Iranian Institute for Reduction of High-risk Behavior, Tehran University of Medical Sciences, Tehran, Iran;5. Department of Virology, Pasteur Institute of Iran, Tehran, Iran;1. School of Chemical and Biotechnology, Sastra University, Thanjavur 613401, India;2. Department of Physics, The LNM Institute of Information Technology, Jaipur 302031, India;3. Surmet Ceramics Corporation, Buffalo, NY 14207, USA;4. College of Engineering and Mines, University of Alaska Fairbanks, AK 99775, USA;1. Industrial Technology Development Institute, Department of Science and Technology, General Santos Ave., Bicutan, Taguig City 1631, Philippines;2. National Research Council of the Philippines, Department of Science and Technology, General Santos Ave., Bicutan, Taguig City 1631, Philippines |
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| Abstract: | ObjectiveTo determine the larvicidal activity of crude aqueous and petroleum ether extracts of Wrightia tinctoria fruits and leaves against the filarial vector, Culex quinquefasciatus.MethodsThe larvicidal activity was evaluated at concentrations of 0.06%, 0.12%, 0.25%, 0.50% and 1.00%. Larval mortality was observed for 24 and 48 h.ResultsAmong the plant parts tested, aqueous fruit extract exhibited highest larvicidal activity followed by aqueous leaf extract with LC50 values of 0.17% and 0.09%; 0.21% and 0.11% after 24 and 48 h respectively.ConclusionsFurther investigations are needed to elucidate this activity against a wide range of all stages of mosquito species and also the active ingredient(s) of the extract responsible for larvicidal activity should be identified. |
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| Keywords: | Crude fruit and leaf extracts Larvicidal activity |
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