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1 December 2014 Synergistic Repellent and Irritant Effect of Combined Essential Oils on Aedes aegypti (L.) Mosquitoes
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Abstract

This study was designed to compare the behavioral responses of Aedes aegypti to a single essential oil and to a mixture of two or three essential oils using an excito-repellency test chamber. Mixtures were prepared from essential oils extracted from Litsea cubeba (LC), Litsea salicifolia (LS), and Melaleuca leucadendron (ML). In general, the mixture of essential oils produced a much stronger escape response by Ae. aegypti, regardless of the test conditions. No significant difference in escape responses was seen when the mixture of oils was compared with a standard commercial product containing DEET. Greater contact irritancy was seen from mixed oils of LC and LS than with other mixed oils. Mixtures of LC and LS at 0.075% showed the highest synergistic action (65.5% escaped) compared to that with unmixed oil alone at the same concentration (LC=20% and LS=32.2%). In addition, mixtures of LC and LS at 0.075% demonstrated the highest non-contact repellency (62.7%) and showed a greater effect than the use of LC (20%) or LS (20.3%) alone. We conclude that mixtures of two essential oils show potential as active ingredients for mosquito repellents.

Atirach Noosidum, Theeraphap Chareonviriyaphap, and Angsumarn Chandrapatya "Synergistic Repellent and Irritant Effect of Combined Essential Oils on Aedes aegypti (L.) Mosquitoes," Journal of Vector Ecology 39(2), 298-305, (1 December 2014). https://doi.org/10.1111/jvec.12104
Received: 7 February 2014; Accepted: 1 June 2014; Published: 1 December 2014
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