Wasps parasitoid species (Hymenoptera: Braconidae) are fruit flies (Diptera: Tephritidae) biological control important agents. This study aimed to know the effects of the release and interspecific competitive relationships of the exotic parasitoid Diachasmimorpha longicaudata Ashmead (Hymenoptera: Braconidae) on the native parasitoid complex of fruit flies in Spondias spp. in the region of Reconcavo Baiano. From April to July of 2006, 8.955 fruits (192.93kg) were collected before and after (24 and 48 hours) release of 9.600 females of D. longicaudata. Exactly 8.724 Tephritidae pupae were obtained, of which 3.963 Anastrepha obliqua (Macquart) adults and 1.115 parasitoids of Braconidae family emerged. Three species of opiinae were identified before releasing. The higher relative frequency was of Doryctobracon areolatus (Szepligeti), followed by Asobara anastrephae (Muesebeck) and Utetes anastrephae (Viereck). 24 and 48 hours after release the exotic parasitoid D. longicaudata on the field, the parasitism rate increased from 15.86% to 20.42% and 45.19%, respectively. It was found that the release of exotic species D. longicaudata has no negative effects on the occurrence of native parasitoids and helps to complement the natural biological control of A. obliqua in fruits of 'umbu-caja' conditions of this study. BR Animals and man. Control. Parasites diseases and disorders. Parasites. Insect parasites. Hosts. Insect hosts. Ecology. Competition. Zoogeography. Dispersal. Means of dispersal. Land zones. Neotropical region. South America. Tephritidae (Cyclorrhapha): Host, Parasite; Braconidae (Ichneumonoidea): Parasite; Diachasmimorpha longicaudata (Braconidae): Parasite. Braconidae: Biological control, Dipteran hosts, Tephritidae, Interspecific competition, Exotic and native parasite interactions, Brazil, Bahia, Reconcavo Baiano region; Diachasmimorpha longicaudata: Biological control, Dipteran hosts, Tephritidae, Interspecific competition, Competitive interactions with native parasites, Impact on habitat, Introduction, Exotic species release, Brazil, Bahia, Reconcavo Baiano region; Tephritidae: Biological control, exotic and native parasite interactions, Hymenopteran parasites, Diachasmimorpha longicaudata, Braconidae, Plant hosts, Spondias, Exotic and native hymenopteran parasite interactions, Brazil, Bahia, Reconcavo Baiano region. ST Animalia, Arthropoda, Insecta, Diptera, Brachycera, Cyclorrhapha; Animalia, Arthropoda, Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Braconidae. Arthropods; Hymenopterans; Insects; Invertebrates; True Flies. none