Journal of Chemical Ecology

, Volume 3, Issue 5, pp 563–577

Neral and geranial: Components of the sex pheromone of the parasitic wasp,Itoplectis conquisitor

  • D. C. Robacker
  • L. B. Hendry

DOI: 10.1007/BF00989077

Cite this article as:
Robacker, D.C. & Hendry, L.B. J Chem Ecol (1977) 3: 563. doi:10.1007/BF00989077


A laboratory investigation of theItoplectis conquisitor sex pheromone was initiated to elucidate the structure(s) of the active component(s) of the system. Functional group tests performed on crude virgin female extract classified the pheromone as unsaturated aldehyde(s) and/or ketone(s). Isolation of active fractions by gas-liquid chromatography (GLC) suggested the existence of a multicomponent pheromone system. Analysis by gas chromatography-mass spectrometry indicated the presence of saturated and unsaturated aldehydes including neral and geranial. When mixtures of neral and geranial were bioassayed independently and in combination with other active GLC fractions, they elicited male sexual activity of intensity comparable to that released by the GLC fraction (DEGS E) from which they were isolated. The authors conclude that neral and/or geranial are components of the sex pheromone system of this species.

Key words

Itoplectis conquisitor (Say)sex pheromonecitralneralgeranial

Copyright information

© Plenum Publishing Corporation 1977

Authors and Affiliations

  • D. C. Robacker
    • 1
  • L. B. Hendry
    • 1
  1. 1.Department of ChemistryThe Pennsylvania State UniversityUniversity Park
  2. 2.Department of EntomologyNorth Carolina State UniversityRaleigh