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Molecules 2017, 22(7), 1050; doi:10.3390/molecules22071050

Myrtaceae Plant Essential Oils and their β-Triketone Components as Insecticides against Drosophila suzukii

1
Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
2
Division of Applied Life Science (BK21+ Program), Gyeongsang National University, Jinju 52828, Korea
3
Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul 02455, Korea
Present address: R&D Bio Team, Agrigento Co., Ltd, Geochang, Gyeongsangnamdo 50119, Korea
*
Author to whom correspondence should be addressed.
Received: 3 June 2017 / Revised: 15 June 2017 / Accepted: 20 June 2017 / Published: 24 June 2017
(This article belongs to the Section Natural Products)
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Abstract

Spotted wing drosophila (SWD, Drosophila suzukii (Matsumura), Diptera: Drosophilidae) is recognized as an economically important pest in North America and Europe as well as in Asia. Assessments were made for fumigant and contact toxicities of six Myrtaceae plant essential oils (EOs) and their components to find new alternative types of insecticides active against SWD. Among the EOs tested, Leptospermum citratum EO, consisting mainly of geranial and neral, exhibited effective fumigant activity. Median lethal dose (LD50; mg/L) values of L. citratum were 2.39 and 3.24 for males and females, respectively. All tested EOs except Kunzea ambigua EO exhibited effective contact toxicity. LD50 (µg/fly) values for contact toxicity of manuka and kanuka were 0.60 and 0.71, respectively, for males and 1.10 and 1.23, respectively, for females. The LD50 values of the other 3 EOs-L. citratum, allspice and clove bud were 2.11–3.31 and 3.53–5.22 for males and females, respectively. The non-polar fraction of manuka and kanuka did not show significant contact toxicity, whereas the polar and triketone fractions, composed of flavesone, isoleptospermone and leptospermone, exhibited efficient activity with the LD50 values of 0.13–0.37 and 0.22–0.57 µg/fly for males and females, respectively. Our results indicate that Myrtaceae plant EOs and their triketone components can be used as alternatives to conventional insecticides. View Full-Text
Keywords: spotted wing drosophila; manuka; kanuka; triketones spotted wing drosophila; manuka; kanuka; triketones
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MDPI and ACS Style

Park, C.G.; Jang, M.; Shin, E.; Kim, J. Myrtaceae Plant Essential Oils and their β-Triketone Components as Insecticides against Drosophila suzukii. Molecules 2017, 22, 1050.

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