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. 2022 Nov 17;27(22):7961.
doi: 10.3390/molecules27227961.

Essential Oils from Vietnamese Asteraceae for Environmentally Friendly Control of Aedes Mosquitoes

Tran Minh Hoi  1 , Prabodh Satyal  2 , Le Thi Huong  3 , Dang Viet Hau  4 , Tran Duc Binh  1 , Dang Thi Hong Duyen  4 , Do Ngoc Dai  5 , Ngo Gia Huy  6 , Hoang Van Chinh  7 , Vo Van Hoa  8 , Nguyen Huy Hung  6   8 , William N Setzer  2   9
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Essential Oils from Vietnamese Asteraceae for Environmentally Friendly Control of Aedes Mosquitoes

Tran Minh Hoi et al. Molecules. .

Abstract

Mosquitoes, in addition to being a biting nuisance, are vectors of several pathogenic viruses and parasites. As a continuation of our work identifying abundant and/or invasive plant species in Vietnam for use as ecologically friendly pesticidal agents, we obtained the essential oils of Blumea lacera, Blumea sinuata, Emilia sonchifolia, Parthenium hysterophorus, and Sphaeranthus africanus; analyzed the essential oils using gas chromatographic techniques; and screened the essential oils for mosquito larvicidal activity against Aedes aegypti and Aedes albopictus. The most active larvicidal essential oils were B. sinuata, which was rich in thymohydroquinone dimethyl ether (29.4%), (E)-β-caryophyllene (19.7%), α-pinene (8.8%), germacrene D (7.8%), and α-humulene (4.3%), (24-h LC50 23.4 and 29.1 μg/mL) on Ae. aegypti and Ae. albopictus, respectively, and Emilia sonchifolia, dominated by 1-undecene (41.9%) and germacrene D (11.0%), (24-h LC50 30.1 and 29.6 μg/mL) on the two mosquito species. The essential oils of P. hysterophorus and S. africanus were also active against mosquito larvae. Notably, B. sinuata, P. hysterophorus, and S. africanus essential oils were not toxic to the non-target water bug, Diplonychus rusticus. However, E. sonchifolia essential oil showed insecticidal activity (24-h LC50 48.1 μg/mL) on D. rusticus. Based on these results, B. sinuata, P. hysterophorus, and S. africanus essential oils appear promising for further investigations.

Keywords: Blumea lacera; Blumea sinuata; Emilia sonchifolia; Parthenium hysterophorus; Sphaeranthus africanus; essential oil composition; larvicidal activity.

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Conflict of interest statement

The authors declare no conflict of interest.

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