Identification of the sex pheromone secreted by Synanthedon hector (Lepidoptera: Sesiidae)

概要

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The Japanese cherry treeborer, Synanthedon hector (Lepidoptera: Sesiidae), is a harmful pest of Prunus trees. After male attraction using a 50:50 mixture of (3E,13Z)- and (3E,13Z)-3,13-octadecadienyl acetates (I and II) was determined a mating disruptant formulated with the two compounds was developed and commercialized; however, the sex pheromone secreted by S. hector females has not been characterized. Analyses of a pheromone gland extract using gas chromatography (GC) equipped with an electroantennographic detector and GC combined with mass spectrometry showed that virgin females produced two 3,13-dienes, I and II, in addition to (2E,13Z)-2,13-octadecadienyl acetate (III). The ratio of the three components (I:II:III) was about 60:36:4. In the field, S. hector males were effectively attracted by a lure baited with a mixture of I and II at a ratio of 70:30-30:70, and III showed neither synergistic nor inhibitory effects on the attraction. Further experiments with other geometrical isomers of the 3,13-dienes indicated that male moths strictly discriminated the configurations of the two double bonds. Mixtures combining one insect-produced isomer (I or II) and other unnatural isomers attracted few males in the field.
日本応用動物昆虫学会の論文
2008-11-25