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Open AccessArticle

Chemical Composition and Bioactivities of the Essential Oil from Etlingera yunnanensis against Two Stored Product Insects

1
Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Beijing Normal University, No.19 Xinjiekouwai Street, Beijing 100875, China
2
Analytical and Testing Center, Beijing Normal University, Beijing 100875, China
3
Department of Pharmacy General Hospital of Second Artillery, PLA, Haidian District, Beijing 100088, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Molecules 2015, 20(9), 15735-15747; https://doi.org/10.3390/molecules200915735
Received: 14 July 2015 / Revised: 8 August 2015 / Accepted: 21 August 2015 / Published: 28 August 2015
(This article belongs to the Collection Herbal Medicine Research)
The chemical composition of the essential oil of Etlingera yunnanensis rhizomes and its contact and repellent activities against Tribolium castaneum (Herbst) and Liposcelis bostrychophila (Badonnel) were investigated. The essential oil obtained from E. yunnanensis rhizomes with hydrodistillation was performed by gas chromatography-flame ionization detection and gas chromatography-mass spectrometry. The main components of the essential oil were identified to be estragole (65.2%), β-caryophyllene (6.4%), 1,8-cineole (6.4%), limonene (5.2%), and α-pinene (2.4%). It was found that the essential oil of E. yunnanensis rhizomes possessed contact toxicity against T. castaneum and L. bostrychophila (LD50 = 23.33 μg/adult and LD50 = 47.38 μg/cm2, respectively). Estragole, 1,8-cineole, and limonene exhibited stronger contact toxicity (LD50 values of 20.41, 18.86, and 13.40 μg/adult, respectively) than β-caryophyllene (LD50 = 41.72 μg/adult) against T. castaneum adults. Estragole possessed stronger contact toxicity (LD50 = 30.22 µg/cm2) than β-caryophyllene, 1,8-cineole, and limonene (LD50 values of 74.11, 321.20, and 239.62 μg/adult, respectively) against L. bostrychophila adults. Repellency of the crude oil was also evaluated. The essential oil and constituents possessed strong repellent activity against T. castaneum adults. The four individual constituents showed weaker repellent activity than the essential oil against L. bostrychophila adults. The results indicated that the essential oil of E. yunnanensis rhizomes and the individual constituents had the potential to be developed as a natural insecticide and repellent for the control of T. castaneum and L. bostrychophila. View Full-Text
Keywords: Etlingera yunnanensis; contact activity; repellency; composition; stored product insects Etlingera yunnanensis; contact activity; repellency; composition; stored product insects
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Guo, S.-S.; You, C.-X.; Liang, J.-Y.; Zhang, W.-J.; Geng, Z.-F.; Wang, C.-F.; Du, S.-S.; Lei, N. Chemical Composition and Bioactivities of the Essential Oil from Etlingera yunnanensis against Two Stored Product Insects. Molecules 2015, 20, 15735-15747.

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