Abstract
Aphomia sociella (Lepidoptera: Pyralidae: Galleriinae) is a parasitic moth of bumblebees. Behavioral experiments show that A. sociella females emit semiochemicals that influence male pre-mating behavior and serve as a courtship pheromone. GC/EAD and two-dimensional GC/MS (GCxGC-TOFMS) analyses of extracts of females revealed three antennally active compounds. Comparative GC and GCxGC-TOFMS analyses of extracts and synthetic standards confirmed the identity of the antennally active compounds as hexan-1-ol (1), 6,10,14-trimethylpentadecan-2-one (2), and 6,10,14-trimethylpentadecan-2-ol (3). In laboratory bioassays, alcohol 3 and, at higher doses, ketone 2 initiated male courtship behavior associated with ultrasonic production. Hexan-1-ol (1) and ketone 2 enhanced the activity of alcohol 3. These data suggest that hexan-1-ol, 6,10,14-trimethylpentadecan-2-ol, and 6,10,14-trimethylpentadecan-2-one constitute the female-produced courtship pheromone of A. sociella.





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Acknowledgements
The project was supported by research project #Z4-055-905 (Academy of Sciences of the Czech Republic) and by grant #2B06007 (The Ministry of Education, Youth, and Sports of the Czech Republic). We thank Jarmila Titzenthalerova for skillful assistance with the GC-EAD experiments and Marketa Foley for language editing.
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Jiří Kindl and Pavel Jiroš contributed equally to this work.
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Fig. S1
Mass spectra of TMPD-one (2) and TMPD-ol (3). (PDF 113 kb)
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Kindl, J., Jiroš, P., Kalinová, B. et al. Females of the Bumblebee Parasite, Aphomia sociella, Excite Males Using a Courtship Pheromone. J Chem Ecol 38, 400–407 (2012). https://doi.org/10.1007/s10886-012-0100-3
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DOI: https://doi.org/10.1007/s10886-012-0100-3


