Mosquito (Diptera: Culicidae) Repellency Field Tests of Essential Oils From Plants Traditionally Used in Laos

Title
Mosquito (Diptera: Culicidae) Repellency Field Tests of Essential Oils From Plants Traditionally Used in Laos
Authors
Vongsombath, C; Palsson, K; Bjork, L; Borg-Karlson, AK; Jaenson, TGT
Keywords
Croton roxburghii, Litsea cubeba, Hyptis suaveolens, essential oil, mosquito repellent
Issue Date
2012
Publisher
ENTOMOLOGICAL SOC AMER
Citation
JOURNAL OF MEDICAL ENTOMOLOGY; Vol.49 6; 1398-1404
Abstract
Essential oils of Hyptis suaveolens (Lamiaceae), Croton roxburghii (Euphorbiaceae), and Litsea cubeba (Lauraceae) were tested in the field near Vientiane city, Lao PDR, on humans for repellent activity against mosquitoes. Landing mosquitoes were collected and later identified. The most abundant mosquitoes captured belonged to the genera Armigeres, Culex, and Aedes. All the plant oils tested at concentrations of 1.7 mu g/cm(2), 3.3 mu g/cm(2), and 6.3 mu g/cm(2) were significantly more mosquito repellent than the negative control. Croton oil was significantly repellent against mosquitoes of the three genera at the highest (6.3 mu g/cm(2)) concentration tested. Litsea oil was significantly repellent against Armigeres at all (1.7 mu g/cm(2), 3.3 mu g/cm(2), and 6.3 mu g/cm(2)) concentrations tested. Hyptis oil was significantly repellent against Armigeres at 3.3 mu g/cm(2) and 6.3 mu g/cm(2) and against Culex at 1.7 mu g/cm(2) and 6.3 mu g/cm(2). The oils were analyzed for chemical content of volatiles, mainly terpenes. Main constituents were beta-pinene, sabinene, and 1,8-cineol from oils of the green parts of H. suaveolens; alpha-pinene, beta-pinene, and alpha-phellandrene from fresh bark of C. roxburghii; and alpha-pinene, beta-phellandrene, sabinene, and 1,8-cineol from fresh fruits of L. cubeba.
URI
http://hdl.handle.net/11267/2093
ISSN
0022-2585
Appears in Collections:
1.National University of Laos > Faculty of Biology > Journal articles
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