The biocontrol agents Diachasmimorpha tryoni (Cameron) and Diachasmimorpha longicaudata (Ashmead), two endoparasitoids of fruit fly larvae, were introduced to Argentina in 1999 with the purpose of renewing the employment of natural enemies against Ceratitis capitata (Wiedemann). For this reason, the general procedure and maintenance of the host and parasitoids rearing in the laboratory are described, and the results of one year insectary production (January-December/2000) of both D. tryoni and D. longicaudata are discussed. Data are presented of the progeny production, offpring sex ratio, host parasitism percentage, and pupal viability per parasitoid rearing cage during 15 generations of D. longicaudata and D. tryoni reared using late third instar larvae of C. capitata. New perspectives are discussed on the establishment of a biological control program for C. capitata and Anastrepha fraterculus (Wiedemann) in Argentina by using parasitoid augmentative releases. Animals and man; Control; Biological control; Techniques; Care in captivity; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Land zones; Neotropical region; South America Ceratitis capitata (Tephritidae); Control by; Diachasmimorpha (Hymenoptera); Application of laboratory hymenopteran production; Hymenopteran parasites; Diachasmimorpha; Argentina; Biocontrol application of parasite laboratory production Diachasmimorpha longicaudata; Diachasmimorpha tryoni (Braconidae ); Control of; Ceratitis capitata (Diptera); Application of laboratory production; Rearing techniques; Reproductive techniques; Laboratory production; Dipteran hosts; Ceratitis capitata; Argentina; Biocontrol application of laboratory production none