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Insects 2019, 10(2), 47; https://doi.org/10.3390/insects10020047

Mosquito Larvicidal Activity of the Essential Oils of Erechtites Species Growing Wild in Vietnam

1
Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University,03 Quang Trung, Da Nang 50000, Vietnam
2
Aromatic Plant Research Center, 230 N 1200 E, Suite 102, Lehi, UT 84043, USA
3
Parasitology and Entomology Unit, Department of Medicine, Duy Tan University, 03 Quang Trung, Da Nang 50000, Vietnam
4
Faculty of Agriculture, Forestry and Fishery, Nghe An Economics University, Vinh City 43000, Nghe An Province, Vietnam
5
School of Natural Science Education, Vinh University, 182 Le Duan, Vinh City 43000, Nghệ An Province, Vietnam
6
Department of Pharmacy, Duy Tan University, 03–Quang Trung, Da Nang 50000, Vietnam
7
Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA
*
Authors to whom correspondence should be addressed.
Received: 27 December 2018 / Revised: 26 January 2019 / Accepted: 31 January 2019 / Published: 3 February 2019
(This article belongs to the Special Issue Development of Botanical Insecticides and Their Application)
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Abstract

Mosquito-borne infections are a constant problem in Vietnam, and mosquito vector control is a primary approach to control these infections. Essential oils represent environmentally friendly alternatives to synthetic pesticides for mosquito control. The essential oils of two weedy species in Vietnam, Erechtites hieraciifolius and E. valerianifolius, have been obtained by hydrodistillation and analyzed by gas chromatography–mass spectrometry. The essential oils have been screened for mosquito larvicidal activity against Aedes albopictus, Ae. aegypti, and Culex quinquefasciatus. The essential oil from the aerial parts of E. hieraciifolius was rich in α-pinene (14.5%), limonene (21.4%), and caryophyllene oxide (15.1%), while E. valerianifolius essential oil was dominated by myrcene (47.8%) and α-pinene (30.2%). Both essential oils showed good larvicidal activity against Ae. albopictus (24-h LC50 10.5 and 5.8 μg/mL, respectively) and Ae. aegypti (24-h LC50 10.6 and 12.5 μg/mL, respectively). The essential oil of E. valerianifolius also showed good activity against Cx. quinquefasciatus larvae (24-h LC50 = 40.7 μg/mL). Thus, Erechtites essential oils may serve as low-cost vector control agents for mosquito-borne infections. View Full-Text
Keywords: Erechtites hieraciifolius; Erechtites valerianifolius; chemical composition; α-pinene; limonene; myrcene; β-caryophyllene; caryophyllene oxide Erechtites hieraciifolius; Erechtites valerianifolius; chemical composition; α-pinene; limonene; myrcene; β-caryophyllene; caryophyllene oxide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hung, N.H.; Satyal, P.; Hieu, H.V.; Chuong, N.T.H.; Dai, D.N.; Huong, L.T.; Tai, T.A.; Setzer, W.N. Mosquito Larvicidal Activity of the Essential Oils of Erechtites Species Growing Wild in Vietnam. Insects 2019, 10, 47.

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