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Molecules 2017, 22(11), 1873; doi:10.3390/molecules22111873

Acaricidal Activity and Synergistic Effect of Thyme Oil Constituents against Carmine Spider Mite (Tetranychus Cinnabarinus (Boisduval))

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1
Institute of Quality Standards & Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, Xinjiang, China
2
Laboratory of Quality and Safety Risk Assessment for Agro-Products (Urumqi), Ministry of Agriculture, Urumqi 830091, Xinjiang, China
3
Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi 830091, Xinjiang, China
4
Agro Technical Extension Center of Altay Prefecture, Altay 836500, Xinjiang, China
*
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 30 October 2017 / Accepted: 30 October 2017 / Published: 1 November 2017
(This article belongs to the Collection Bioactive Compounds)
View Full-Text   |   Download PDF [1481 KB, uploaded 1 November 2017]   |  

Abstract

Studies examining the use of essential oils as replacements for synthetic insecticides require an understanding of the contribution of each constituent present, interactions among these components, and how they relate to overall toxicity. In the present study, the chemical composition of commercial thyme oil was identified by gas chromatography-mass spectrometry. Thyme oil and blends of its major constituents were tested for their acaricidal activitities against carmine spider mites (Tetranychus cinnabarinus (Boisduval)) using a slide-dip bioassay. Natural thyme oil showed greater toxicity than any single constituent or blend of constituents. Thymol was the most abundant component (34.4%), and also possessed the strongest acaricidal activity compared with other single constituents. When tested individually, four constituents (linalool, terpinene, p-cymene and carvacrol) also had activity, while α-pinene, benzoic acid and ethyl gallate had almost no activity. The toxicity of blends of selected constituents indicated a synergistic effect among the putatively active and inactive constituents, with the presence of all constituents necessary to reach the highest toxicity. The results indicated that thyme oil and some of its major constituents have the potential to be developed into botanical acaricides. View Full-Text
Keywords: plant essential oil; thyme oil; thymol; synergistic effect; botanical acaricides plant essential oil; thyme oil; thymol; synergistic effect; botanical acaricides
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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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MDPI and ACS Style

Wu, L.; Huo, X.; Zhou, X.; Zhao, D.; He, W.; Liu, S.; Liu, H.; Feng, T.; Wang, C. Acaricidal Activity and Synergistic Effect of Thyme Oil Constituents against Carmine Spider Mite (Tetranychus Cinnabarinus (Boisduval)). Molecules 2017, 22, 1873.

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