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Molecules 2013, 18(4), 4308-4327; doi:10.3390/molecules18044308
Article

Chemical Composition, Antifungal and Insecticidal Activities of Hedychium Essential Oils

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Received: 17 February 2013 / Revised: 29 March 2013 / Accepted: 29 March 2013 / Published: 11 April 2013
(This article belongs to the Section Metabolites)
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Abstract

The antimicrobial properties of essential oils have been documented, and their use as “biocides” is gaining popularity. The aims of this study were to analyze the chemical composition and assess the biological activities of Hedychium essential oils. Oils from 19 Hedychium species and cultivars were analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) techniques. The antifungal and insecticidal activities of these oils were tested against Colletotrichum acutatum, C. fragariae, and C. gloeosporioides, and three insects, the azalea lace bug (Stephanitis pyrioides), the yellow fever mosquito (Aedes aegypti), and the red imported fire ant (Solenopsis invicta). Hedychium oils were rich in monoterpenes and sesquiterpenes, especially 1,8-cineole (0.1%–42%), linalool (<0.1%–56%), a-pinene (3%–17%), b-pinene (4%–31%), and (E)-nerolidol (0.1%–20%). Hedychium oils had no antifungal effect on C. gloeosporioides, C. fragariae, and C. acutatum, but most Hedychium oils effectively killed azalea lace bugs. The oils also show promise as an adult mosquito repellent, but they would make rather poor larvicides or adulticides for mosquito control. Hedychium oils acted either as a fire ant repellent or attractant, depending on plant genotype and oil concentration.
Keywords: Hedychium cultivars; natural botanical insecticides; azalea lace bugs; yellow fever mosquito; red imported fire ants Hedychium cultivars; natural botanical insecticides; azalea lace bugs; yellow fever mosquito; red imported fire ants
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.

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Sakhanokho, H.F.; Sampson, B.J.; Tabanca, N.; Wedge, D.E.; Demirci, B.; Baser, K.H.C.; Bernier, U.R.; Tsikolia, M.; Agramonte, N.M.; Becnel, J.J.; Chen, J.; Rajasekaran, K.; Spiers, J.M. Chemical Composition, Antifungal and Insecticidal Activities of Hedychium Essential Oils. Molecules 2013, 18, 4308-4327.

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