Repellent activity of Ageratum houstonianum Mill. (Asteraceae) leaf extracts against Anopheles stephensi,Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) |
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| Authors: | Samuel Tennyson John Ravindran Alex Eapen John William |
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| Affiliation: | 1. Department of Zoology, Madras Christian College, Chennai 600 059, Tamilnadu, India;2. National Institute of Malaria Research (ICMR) Field Unit, NIE Campus, 2nd Main Road, TNHB Ayapakkam, Chennai 600 077, Tamilnadu, India;3. School of Entomology and Centre for Natural Resources Management (SECNARM), P.G. & Research Department of Advanced Zoology and Biotechnology, Loyola College, Chennai 600 034, Tamilnadu, India;1. School of Biological Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia;2. Vector Control Research Unit, Universiti Sains Malaysia, Penang 11800, Malaysia;3. Centre of Marine & Coastal Studies (CEMACS), Universiti Sains Malaysia, Penang 11800, Malaysia;1. University of Agricultural Sciences and Veterinary Medicine, Department of Parasitology, Avenue Manastur 3-5, 400372, Cluj-Napoca, Romania;2. VetAgro Sup, Veterinary Campus of Lyon, University of Lyon, Department of Parasitology, 1 avenue Bourgelat, F-69280 Marcy-Etoile, France;3. Laboratory of Biometrics and Evolutionary Biology, CNRS UMR 5558, University of Lyon, 43 Boulevard of 11 November, 69622 Villeurbanne, France;1. Plant Production Technology Section, Faculty of Agricultural Technology, King Mongkut''s Institute of Technology Ladkrabang, Bangkok 10520, Thailand;2. Department of Entomology, US Army Medical Component, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand |
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| Abstract: | ObjectiveTo determine the repellent activity of hexane, ethyl acetate and methanol crude extracts of Ageratum houstonianum(A. houstonianum) leaves against adult Anopheles stephensi (An. stephensi), Aedes aegypti (Ae. aegypti) and Culex quinquefasciatus (Cx. quinquefasciatus) mosquitoes.MethodsBioassay on laboratory reared Swiss albino mice by topical application at a fixed concentration of 0.01 per cent with coconut oil as a base.ResultsCrude leaf extracts of A. houstonianum in combination with coconut oil repelled vector mosquitoes. Maximum protection for a period of 11.30 h was obtained against Cx. quinquefasciatus and An. stephensi when treated with methanol and hexane extracts followed by 8.30 h against Ae. aegypti in methanol extract. Amongst the three extracts, methanol extract gave the maximum protection of 95.0% against Cx. quinquefasciatus. Hexane and ethyl acetate extracts gave a maximum of 93.4% protection against An. stephensi.ConclusionsThe crude extracts of A. houstonianum leaves in combination with coconut oil showed repellent activity with repellent quotient ranging from 0.6 to 0.9. |
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