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The establishment of a rearing technique for the fruit fly parasitoid Baryscapus silvestrii increases knowledge of biological, ecological and behavioural traits

  • R. Sasso
  • L. Gualtieri
  • E. Russo
  • F. Nugnes
  • M. Gebiola
  • U. BernardoEmail author


We have evaluated different rearing strategies of Baryscapus silvestrii (Hymenoptera: Eulophidae), a parasitoid of Bactrocera oleae (Diptera: Tephritidae), including the use of a factitious host, Ceratitis capitata (Diptera: Tephritidae), and in the process acquired new knowledge of the parasitoid’s biology. We found that B. silvestrii: (1) parasitizes only puparia and exclusively if they are concealed, (2) is able to parasitize and complete its development on puparia of all ages, (3) prefers to oviposit on the medfly in choice tests, (4) completes development faster if reared on 2–3 day-old puparia, (5) exhibits sex allocation related to host puparium age. This study provides critical information on several biological traits of B. silvestrii, and the new rearing method can be used to establish a parasitoid rearing for augmentative releases.


Biological control Bactrocera oleae Ceratitis capitata Eulophidae Sex allocation 



The authors thank Elisa Troiano, Marco Tiseo, and Pasquale De Stefano for their precious technical help in a preliminary part of tests, Michele Innangi for statistical help, and Anna Giulia Nappo and Lorenzo Marrazzo for their precious technical help. This research was partly supported by the Campania Region funded URcOFi project (Unità Regionale Coordinamento Fitosanitario).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.


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Copyright information

© International Organization for Biological Control (IOBC) 2019

Authors and Affiliations

  1. 1.ENEA C.R. Casaccia, Laboratory SSPT-BIOAG-SOQUASRomeItaly
  2. 2.CNR, Institute for Sustainable Plant Protection, ss of PorticiPorticiItaly
  3. 3.Department of EntomologyUniversity of CaliforniaRiversideUSA

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