Heptyl butyrate, a putative pheromone involved in social communication of Vespula germanica wasps

  • Micaela Buteler
  • Patricia Fernandez
  • Teodoro Stadler
  • David K. Weaver
  • Belen Yossen
  • Mariana Lozada
Research Article

Abstract

Greater knowledge on the social communication of invasive Vespula germanica wasps is needed to fully understand their foraging behavior. This is particularly valuable considering that poison baiting is currently the only effective way of reducing wasp density. Heptyl butyrate is an attractant for many wasp species, but attempts to determine effects on V. germanica have yielded mixed results. We studied the behavior elicited by heptyl butyrate on V. germanica wasps in field experiments with foraging wasps. We also analyzed headspace volatiles of live V. germanica workers, to determine if heptyl butyrate is emitted. Heptyl butyrate was present in the headspace of live workers. Amounts of heptyl butyrate averaged 1.4 ± 0.2 ng per sample per hour, where each sample included six workers. Wasps approaching filter papers treated with different concentrations of heptyl butyrate hovered over it, but only a small percentage landed on it. Pure heptyl butyrate elicited the greatest response although all the concentrations tested were attractive. When heptyl butyrate was applied to protein baits, a greater number landed on the treated baits than on untreated ones, demonstrating this compound enhances attractiveness of baits. Results from our study suggest that heptyl butyrate is a pheromonal compound involved in attracting conspecifics to food resources, but other cues are needed to trigger landing.

Keywords

Attractant Recruitment Semiochemical Social insects Yellowjackets Heptyl butanoate 

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Copyright information

© International Union for the Study of Social Insects (IUSSI) 2017

Authors and Affiliations

  1. 1.Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA) CONICETUniversidad Nacional del ComahueBarilocheArgentina
  2. 2.INTA, Estación Experimental Agropecuaria Delta del Paraná. Consejo Nacional de Investigaciones Científicas y TecnológicasCampanaArgentina
  3. 3.CONICET Godoy Cruz 2290 (C1425FQB) CABABuenos AiresArgentina
  4. 4.Instituto de Medicina y Biología Experimental (IMBECU), CCT Mendoza, CONICET, Parque GralMendozaArgentina
  5. 5.Department of Land Resources and Environment SciencesMontana State UniversityBozemanUSA

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