Emergence, dispersal, and mate finding via a substrateborne sex pheromone in the parasitoid Metaphycus luteolus

Stefano Colazza, Ezio Peri, Apostolos Kapranas, Jocelyn G. Millar, Daniela Lo Giudice

Risultato della ricerca: Articlepeer review

9 Citazioni (Scopus)

Abstract

Metaphycus luteolus Timberlake (Hymenoptera: Encyrtidae) is a facultatively gregarious parasitoid of soft scale insects. We conducted behavioral experiments to better understand the mating structure of this species. Emergence of male and female offspring is synchronized, beginning at the onset of photoperiod. Both sexes are able to disperse, although dispersal of males from natal patches appears to take longer than dispersal of females. We demonstrated the presence of a female-produced contact pheromone using open arena bioassays and motion tracking software, testing residues deposited by walking females, and extracts of females. Males responded to the females' chemical footprints' and to acetone and hexane extracts of females by searching and arrestment on the chemical residues. Responses of males were dose dependent and diminished with time since the stimulus was deposited. Our findings support the hypothesis that non-local mating among wasps emerging from different hosts may be quite common in these parasitoids. The implications of our results for the mating structure and previously documented sex ratio patterns of these parasitoids are described.
Lingua originaleEnglish
pagine (da-a)74-83
Numero di pagine10
RivistaEntomologia Experimentalis et Applicata
Volume148
Stato di pubblicazionePublished - 2013

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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