Abstract
The Japanese persimmon treeborer, Synanthedon tenuis (Butler) (Lepidoptera: Sesiidae), is a harmful pest of persimmon trees (Diospyros spp.). Because males of this species are known to be attracted by (3Z,13Z)-3,13-octadecadienyl acetate (Z3,Z13-18:OAc), a mating disruptant composed of a 1:1 mixture of Z3,Z13-18:OAc and the (3E,13Z)-isomer, the original target of which is an allied pest, S. hector (Butler), has been diverted to control S. tenuis. However, the sex pheromone secreted by S. tenuis females has not been characterized. Analyses of pheromone gland extracts using gas chromatography (GC) equipped with an electroantennographic detector (GC-EAD) and GC combined with mass spectrometry (GC–MS) detected only Z3,Z13-18:OAc, and no other known sesiid pheromone components were found. In a persimmon orchard, S. tenuis males were selectively attracted by a lure baited with Z3,Z13-18:OAc among four geometrical isomers of 3,13-octadecadienyl acetate, indicating that males strictly discriminated among the configurations of the two double bonds. Lures baited with single Z3,Z13-18:OAc attracted only S. tenuis. Further field experiments revealed that the attractiveness of Z3,Z13-18:OAc is significantly inhibited by the addition of the (3E,13Z) isomer or the parent alcohol.
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Acknowledgments
We are grateful to R. Wakasugi, D. Wakatsuki, and the students of the laboratory of the Zoological Department at Meijo University and to Dr. Y. KonDo of the Laboratory of Insect Ecology at Gifu University, who kindly helped with field experiments and collecting insects. We also thank the teaching staff of the Experimental Farm of Meijo University, who made using the farm so pleasant, and Dr. K. Ito of the National Institute for Agro-Environmental Sciences for statistical analyses. This work was supported in part by a research fund from Heart Co., Ltd. (Tokyo, Japan).
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Naka, H., Suzuki, T., Watarai, T. et al. Identification of the sex pheromone secreted by Synanthedon tenuis (Lepidoptera: Sesiidae). Appl Entomol Zool 48, 27–33 (2013). https://doi.org/10.1007/s13355-012-0148-0
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DOI: https://doi.org/10.1007/s13355-012-0148-0