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Open AccessCommunication

The Mosquito Larvicidal Activity of Essential Oils from Cymbopogon and Eucalyptus Species in Vietnam

1
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Lac Hong University, Bien Hoa, Dong Nai 810000, Vietnam
2
Department of Physiology, Faculty of Pharmacy, Lac Hong University, Bien Hoa, Dong Nai 810000, Vietnam
*
Author to whom correspondence should be addressed.
Insects 2020, 11(2), 128; https://doi.org/10.3390/insects11020128
Received: 2 January 2020 / Revised: 14 February 2020 / Accepted: 14 February 2020 / Published: 17 February 2020
(This article belongs to the Special Issue Natural Substances against Insect Pests: Assets and Liabilities)
The larvicidal activity of essential oils (EOs) extracted from Cymbopogon citratus, Cymbopogon winterianus, Eucalyptus citriodora, and Eucalyptus camaldulensis aromatic plants grown in Vietnam was evaluated on Aedes aegypti larvae. The EOs were hydro-distilled in a Clevenger-type apparatus. The EOs were analyzed by gas chromatography–mass spectrometry (GC–MS). The mortality rates obtained from the bioassays were used to calculate the lethal concentrations (LC50) of the EOs by the probit analysis method. These essential oils exhibited toxicity to the larvae of Aedes aegypti. Results were obtained for Cymbopogon citratus (LC50 = 120.6 ppm), Cymbopogon winterianus (LC50 = 38.8 ppm), Eucalyptus citriodora (LC50 = 104.4 ppm), and Eucalyptus camaldulensis (LC50 = 33.7 ppm). The essential oils of Eucalyptus camaldulensis and Cymbopogon winterianus were found to be the most efficient, and their respective values of LC50 were 33.7 ppm, 38.8 ppm. In conclusion, this research adds to the growing body of literature on natural larvicides from essential oils against Aedes aegypti mosquitoes. View Full-Text
Keywords: essential oils; Cymbopogon species; Eucalyptus species; larvicide; Aedes aegypti; Vietnam essential oils; Cymbopogon species; Eucalyptus species; larvicide; Aedes aegypti; Vietnam
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MDPI and ACS Style

Manh, H.D.; Hue, D.T.; Hieu, N.T.T.; Tuyen, D.T.T.; Tuyet, O.T. The Mosquito Larvicidal Activity of Essential Oils from Cymbopogon and Eucalyptus Species in Vietnam. Insects 2020, 11, 128.

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