Abstract
The spruce seed moth, Cydia strobilella L., is a serious pest on cones of spruce (Picea spp.) in the Holarctic region. Previous studies from different parts of its area of distribution have reported conflicting results on the composition of its sex pheromone. By gas chromatography with electroantennographic detection, coupled gas chromatography-mass spectrometry, a Y-tube olfactometer bioassay, and field trials, the sex pheromone of Swedish populations of the species was identified as (8E,10E)-dodecadienyl acetate and (8E,10Z)-dodecadienyl acetate. About 0.5 pg of each pheromone component was extracted per female. The most attractive blend of EE- and EZ-isomers was about 6:4, respectively, and 0.3 µg of the blend per rubber septum was the most attractive dosage for field trapping. Monounsaturated components previously reported as sex pheromone components/attractants for C. strobilella, (E)-8-dodecenyl acetate in Canadian populations and (Z)-8-dodecenol in Polish and Dutch populations, did not attract any C. strobilella in this study. Large numbers of C. jungiella Clerck were trapped by using (8E,10Z)-dodecadienyl acetate alone, whereas (Z)-8-dodecenol attracted Pammene splendidulana Guenée and P. rhediella Clerck.
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Acknowledgements
We are grateful to Ingvar Svensson for assistance with identification of the trapped insects. The research was supported by a grant from The Swedish Tree Breeding Association, and a grant from the vice chancellor at Lund University for cooperation between Lund University and the Swedish Agricultural University at Alnarp.
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In memoriam of professor Jan Löfqvist and in recognition of his contributions to insect chemical ecology.
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Wang, HL., Svensson, G.P., Rosenberg, O. et al. Identification of the Sex Pheromone of the Spruce Seed Moth, Cydia strobilella L.. J Chem Ecol 36, 305–313 (2010). https://doi.org/10.1007/s10886-010-9754-x
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DOI: https://doi.org/10.1007/s10886-010-9754-x