Comparative repellency of 38 essential oils against mosquito bites
Autor(es): Trongtokit, Y; Rongsriyam, Y; Komalamisra, N; Apiwathnasorn, C
Resumo: The mosquito repellent activity of 38 essential oils from plants at three concentrations was screened against the mosquito Aedes aegypti under laboratory conditions using human subjects. On a volunteer's forearm, 0.1 mL of oil was applied per 30 cm(2) of exposed skin. When the tested oils were applied at a 10% or 50% concentration, none of them prevented mosquito bites for as long as 2 h, but the undiluted oils of Cymbopogon nardus (citronella), Pogostemon cablin (patchuli), Syzygitun aromaticum (clove) and Zanthoxylum limonella (Thai name: makaen) were the most effective and provided 2 h of complete repellency.From these initial results, three concentrations (10%, 50% and undiluted) of citronella, patchouli, clove and makaen were selected for repellency tests against Culex quinquefasciatus and Anopheles dirus. As expected, the undiluted oil showed the highest protection in each case. Clove oil gave the longest duration of 100% repellency (2-4 h) against all three species of mosquito. Copyright (c) 2005 John Wiley & Sons, Ltd.
Palavras-Chave: Mosquito repellent; Cymbopogon nardus; Pogostemon cablin; Syzygium aromaticum; Zanthoxylum limonella; Aedes aegypti; Culex quinque fasciatus; Anopheles dirus
Imprenta: Phytotherapy Research, v. 19, n. 4, p. 303-309, 2005
Identificador do objeto digital: 10.1002/ptr.1637
Descritores: Aedes aegypti - Repellent
Data de publicação: 2005
