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1 September 2006 Adult Repellency and Larvicidal Activity of Five Plant Essential Oils Against Mosquitoes
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Abstract

The larvicidal activity and repellency of 5 plant essential oils—thyme oil, catnip oil, amyris oil, eucalyptus oil, and cinnamon oil—were tested against 3 mosquito species: Aedes albopictus, Ae. aegypti, and Culex pipiens pallens. Larvicidal activity of these essentials oils was evaluated in the laboratory against 4th instars of each of the 3 mosquito species, and amyris oil demonstrated the greatest inhibitory effect with LC50 values in 24 h of 58 µg/ml (LC90  =  72 µg/ml) for Ae. aegypti, 78 µg/ml (LC90  =  130 µg/ml) for Ae. albopictus, and 77 µg/ml (LC90  =  123 µg/ml) for Cx. p. pallens. The topical repellency of these selected essential oils and deet against laboratory-reared female blood-starved Ae. albopictus was examined. Catnip oil seemed to be the most effective and provided 6-h protection at both concentrations tested (23 and 468 µg/cm2). Thyme oil had the highest effectiveness in repelling this species, but the repellency duration was only 2 h. The applications using these natural product essential oils in mosquito control are discussed.

Junwei Zhu and Xiaopeng Zeng "Adult Repellency and Larvicidal Activity of Five Plant Essential Oils Against Mosquitoes," Journal of the American Mosquito Control Association 22(3), 515-522, (1 September 2006). https://doi.org/10.2987/8756-971X(2006)22[515:ARALAO]2.0.CO;2
Published: 1 September 2006
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