not in Young Rearings in laboratory of Tetrastichus turionum Hartig (Hymenoptera: Eulophidae), a pupal parasitoid of Rhyacionia buoliana Den. et Schiff. (Lepidoptera: Tortricidae) were carried out. It was studied the adult longevity, their productivity, sex ratio, oviposition preferences and rupture of the diapause. The average longevity of the males was up to 27 days and that of the females up to 41 days when they are fed with humidified raisins and water. The average productivity by host was next of 42 individuals by pupa, with a favorable sex ratio to the females (1:2.6). The maintenance of controlled conditions of spring (photoperiod 14:10, 23[degree]/15[degree]C) it allows the reproduction in short cycle or the rupture of the diapause stage. The results confirmed the suitability of T. turionum like complementary parasitoid of Orgilus obscurator Nees (Hymenoptera: Braconidae) for their introduction and application in the biological control of R. buoliana in Chile. BR 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. Rhyacionia buoliana (Tortricidae): Host; Tetrastichus turionum (Eulophidae): Parasite. Rhyacionia buoliana: Control by, Tetrastichus turionum (Hymenoptera), Suitability evaluation, Hymenopteran parasites, Tetrastichus turionum, Parasite biology, laboratory rearing and biocontrol suitability evaluation, Chile, Hymenopteran parasite biology; Tetrastichus turionum: Control of, Rhyacionia buoliana (Lepidoptera), Suitability evaluation, Rearing techniques, Laboratory rearing, Lepidopteran hosts, Rhyacionia buoliana, Biology, laboratory rearing and biocontrol suitability evaluation, Chile, laboratory rearing and biocontrol of lepidopteran host suitability evaluation. ST Insecta, Lepidoptera, Glossata, Heteroneura, Tortricoidea, Tortricidae; Insecta, Hymenoptera, Apocrita, Terebrantia, Chalcidoidea, Eulophidae. Arthropods; Hymenopterans; Insects; Invertebrates; Lepidopterans. none