The larvicidal activity of 4 plant essential oils—cinnamon oil, lemon eucalyptus oil, sandalwood oil, and turmeric oil—previously reported as insect repellents was evaluated in the laboratory against 4th instars of Aedes albopictus, Ae. aegypti, and Culex pipiens. Sandalwood oil appeared to be the most effective of the larvicides, killing larvae of all 3 mosquito species in relatively short times. The values of LT50 and LT90 at the application dosage (0.2 mg/ml) were 1.06 ± 0.11 and 3.24 ± 0.14 h for Ae. aegypti, 1.82 ± 0.06 and 3.33 ± 0.48 h for Ae. albopictus, and 1.55 ± 0.07 and 3.91 ± 0.44 h for Cx. pipiens, respectively. Chemical compositions of these essential oils were also studied, and the lavicidal activity of their major ingredient compounds was compared with that of each of the essential oils. The acute toxicity of the 4 essential oils to fathead minnows was also evaluated. The safe use of these natural plant essential oils in future applications of mosquito control was discussed.
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1 March 2008
Mosquito Larvicidal Activity of Botanical-Based Mosquito Repellents
Junwei Zhu,
Xiaopeng Zeng,
Megan O'neal,
Gretchen Schultz,
Brad Tucker,
Joel Coats,
Lyric Bartholomay,
Rui-De Xue
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Journal of the American Mosquito Control Association
Vol. 24 • No. 1
March 2008
Vol. 24 • No. 1
March 2008
Ae. Aegypti
Aedes albopictus
Botanical-based repellents
Culex pipiens
ecotoxicity
larvicides
repellency