Contribution a l'étude biologique d'Opius concolor Szepl. (Hym. Braconidae) En élevage de laboratoire

Summary It is possible to obtain a permanent breeding ofOpius concolor by use of third instar larvae ofCeratitis capitata as host. TheOpius obtained by such breeding will accept to parasitize successfully the larvae ofDacus oleae. This breeding will allow the study of many obscure points of the biology of the parasite, mainly conditions by which the host is chosen by the laying female and the reason of the endoparasitical development in the two hosts. It should be useful to know if the ecological strains are differenciated by similar experimentation withO. siculus Monastero. It should be aslo interesting to extend this experience to other Trypetid species (for instance to the hosts ofOpius humilis Silv.: Braconid which is spread in Hawaii might be a synonym ofconcolor asFischer supposes). This breeding could be eventually used to start the study and realisation of industrial multiplications in view of the biological control applications.