BioControl

, Volume 48, Issue 3, pp 275–291

Mortality by parasitization in the association between the egg-pupal parasitoid Fopius arisanus and Ceratitis capitata

  • Riccardo Moretti
  • Maurizio Calvitti
Article

DOI: 10.1023/A:1023610421270

Cite this article as:
Moretti, R. & Calvitti, M. BioControl (2003) 48: 275. doi:10.1023/A:1023610421270

Abstract

We studied the interaction betweenthe egg-pupal parasitoid Fopius (+ Biosteres) arisanus (Sonan) (+Opius oophilus Fullaway) (Hymenoptera: Braconidae) and Ceratitis capitata (Wiedemann)(Diptera: Tephritidae) to assess the totalimpact of the parasitoid on the survival ofthis host. We tried to discover the factorsdetermining host suitability, measure actualpercent parasitism, and quantify host mortalityby parasitization. Research was carried outapplying dechorionation treatment, anon-destructive procedure that makes hosteggshells transparent to microscopicobservation, without interfering withdevelopment. We found that percent parasitismobserved at the egg stage did not correspond tothat detectable for emerging adults. In fact,parasitized host eggs were subject to a highermortality than non-parasitized ones. Moreover,a certain percentage of the parasitoid eggs didnot develop to the adult stage. Results fromour study allowed us to measure the percentmortality by parasitization per parasitizedegg. Furthermore, we analyzed the mortalityfactors due to parasitization acting during thehost egg stage. Most of them had never beenevidenced before and may help to explain thisphenomenon. In particular, we found that theage of the host eggs exposed to parasitoidsplays a fundamental role in the mortality byparasitization and that F. arisanusparasitizes C. capitata eggs moreefficiently close to the time of eclosion.

Ceratitis capitata dechorionation egg-pupal parasitoid Fopius arisanus host killing Mediterranean fruit fly percent parasitism 

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Riccardo Moretti
    • 1
  • Maurizio Calvitti
    • 1
  1. 1.Division of Agriculture and BiotechnologyENEA-CRE Casaccia Via Anguillarese 301(Rome)Italy

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