Phytochemical composition and larvicidal activity of essential oils from herbal plants

Mosquitoes act as vectors for many life-threatening diseases, including malaria, dengue fever, and Zika virus infection. Management of mosquitoes mainly relies on synthetic insecticides, which usually result in the rapid development of resistance; therefore, alternative mosquito control strategies a...

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Veröffentlicht in:Planta 2019-07, Vol.250 (1), p.59-68
Hauptverfasser: Huang, Hsiang-Ting, Lin, Chien-Chung, Kuo, Tai-Chih, Chen, Shiang-Jiuun, Huang, Rong-Nan
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Kuo, Tai-Chih
Chen, Shiang-Jiuun
Huang, Rong-Nan
description Mosquitoes act as vectors for many life-threatening diseases, including malaria, dengue fever, and Zika virus infection. Management of mosquitoes mainly relies on synthetic insecticides, which usually result in the rapid development of resistance; therefore, alternative mosquito control strategies are urgently needed. This study characterized the major component of essential oils (EOs) derived from the vegetative parts of four herbal plants and their larvicidal activity toward important mosquito vectors. The EOs were extracted by hydro-distillation and subjected to gas chromatography–mass spectrometry (GC–MS) analysis and a larvicidal activity assay toward Aedes aegypti, Ae. albopictus and Culex quinquefasciatus. In total, 14, 11, 11 and 9 compounds were identified from the EOs of Plectranthus amboinicus, Mentha requienii, Vitex rotundifolia and Crossostephium chinense, respectively. The EOs derived from four herbal plants exhibited remarkable larvicidal activity against the three mosquito species. In particular, the EOs of P. amboinicus showed the highest larvicidal activity, and the larvae of Cx. quinquefasciatus were more sensitive to the P. amboinicus EOs than that of Ae. Aegypti. Although carvacrol (61.53%) was the predominant constituent of the P. amboinicus EOs, its precursors, γ-terpinene (8.51%) and p-cymene (9.42%), exhibited the most larvicidal activity toward Ae. aegypti and Cx. quinquefasciatus. However, ß-caryophyllene (12.79%) might be the major component responsible for the differential toxicity of the P. amboinicus EOs, as indicated by the significant differences in its LC₅₀ values toward both mosquitoes. Information from these studies will benefit the incorporation of EOs into integrated vector management.
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subjects Aedes - drug effects
Aedes - virology
Aedes aegypti
Aedes albopictus
Agriculture
Animals
Aquatic insects
Biomedical and Life Sciences
Carvacrol
Caryophyllene
Chemical composition
Culex - drug effects
Culex - virology
Culex quinquefasciatus
Culicidae
Dengue fever
Distillation
Ecology
Essential oils
Fever
Forestry
Gas chromatography
Gas Chromatography-Mass Spectrometry
Insect control
Insecticide resistance
Insecticides
Insecticides - chemistry
Insecticides - isolation & purification
Insecticides - pharmacology
Larva
Larvae
Larvicides
Life Sciences
Malaria
Mass spectrometry
Mass spectroscopy
Mosquito Control
Mosquito Vectors - drug effects
Mosquito Vectors - virology
Mosquitoes
Oils & fats
Oils, Volatile - chemistry
Oils, Volatile - isolation & purification
Oils, Volatile - pharmacology
ORIGINAL ARTICLE
p-Cymene
Phytochemicals - chemistry
Phytochemicals - isolation & purification
Phytochemicals - pharmacology
Plant Oils - chemistry
Plant Oils - isolation & purification
Plant Oils - pharmacology
Plant Sciences
Plants (botany)
Plectranthus amboinicus
Polycyclic Sesquiterpenes
Sesquiterpenes - chemistry
Sesquiterpenes - isolation & purification
Sesquiterpenes - pharmacology
Terpinene
Toxicity
Tropical diseases
Vector-borne diseases
Vectors
Viral diseases
Viruses
title Phytochemical composition and larvicidal activity of essential oils from herbal plants
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