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Preliminary evaluation of the repellent activity of some plant essential oils against Simulium damnosum s.l., the vector of human onchocerciasis

Published online by Cambridge University Press:  28 February 2007

M.S.O. Aisien ,
A.A. Imasuen ,
V.A. Wagbatsoma  and
B.A. Ayinde
M.S.O. Aisien*
Affiliation:
Laboratory of Parasitology Research, Department of Zoology, University of Benin, Benin City, Nigeria
A.A. Imasuen
Affiliation:
Laboratory of Parasitology Research, Department of Zoology, University of Benin, Benin City, Nigeria
V.A. Wagbatsoma
Affiliation:
Department of Community Health, Faculty of Medicine, University of Benin, Benin City, Nigeria
B.A. Ayinde
Affiliation:
Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City, Nigeria
*
*: E-mail: aisien@uniben.net
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Abstract

Volatile oils of Citrus sinensis, Ageratum conyzoides, Cymbopogon citratus, Callistemon rigidus and Ocimum gratissimum were tested as repellents against blackfly, Simulium damnosum s.l., the vector of human onchocerciaisis. Topical applications of 10 and 20% v/v concentrations of the oils with liquid paraffin as the carrier, were made on the forearms and legs of four volunteers, with ordinary paraffin oil used as the control. At 10% v/v concentration the protection time was between 30min and 1h with the Citrus, Ageratum, Cymbopogon and Callistemon oils. At 20% Citrus, Ageratum and Cymbopogon oils repelled the blackflies for up to 2h while Callistemon and Ocimum oils were effective for 3h. Application of these volatile oils, especially at the peak biting periods, would serve to reduce human–vector contact and thereby limit disease transmission.

Keywords

plant volatile oilsrepellent actionblackflySimulium damnosum s.lonchocerciaisisessential oils
Type
Short Communication
Information
International Journal of Tropical Insect Science , Volume 24 , Issue 2 , June 2004 , pp. 196 - 199
Copyright
Copyright © ICIPE 2004

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