From several phytophagous organisms we reared and identified 100 species of parasitoids and predators (nematodes and insects). The great majority of these parasitoids are insects (Hymenoptera and Diptera), parasiting different developing stages (eggs, larvae and pupae) of various phytophagous insects which attack cultivated plants, such as aphids (Sitobion avenae, Phodoron humuli), beetles (Apion spp., Bruchidius spp., Anthonomus spp., Cyonus spp., Gymnetron spp., Larinus spp), butterflies (Aporia crataegi, Eupista alcionypenella, Euproctis chrysorrhoea, Lyonetia clerckella, Hedya nubiferana, Ostrinia nubilalis, Pyrausta sticticalis, plodia interpunctella, Spilonota ocellana), wasps (Bruchophagus spp., Eurytoma onobrychis) and flies (Asphondylia myki, Contarinia medicaginis, Chlorops pumilionis, Oscinella spp.). Other parasitoid insects were obtained from phytophagous insects on weeds, such as Cyonus spp., Gymnetron spp., Larinus spp., Heliophobus reticulata, Metzneria sp! p., Epinotia spp., Vanessa polychoruos, Eurytoma spp., Eurybia spp., Tephritis spp., and Urophora spp. From these phytophagous organisms we isolated and identified several nematodes and insects, belonging to families such as: Mermithidae (Nematoda), Chrysopidae (Neuroptera), Anthochoridae, Miridae, Nabidae (Heteroptera), Coccinellidae, Carabidae (Coleoptera), Aphelinidae, Eurytomidae, Eulophidae, Elasmidae, Eupelmidae, Encyrtidae, Pteromalidae, Trichogrammatidae, Aphidiidae, Braconidae, Ichneumonoidea (Hymenoptera), Cecidomyiidae, Leucopidae, Syrphidae and Tachinidae (Diptera). BR Animals and man. Damage caused by animals. Damage to vegetation. Nutrition. Diet. Prey. Parasites diseases and disorders. Parasites. Helminth parasites. Insect parasites. Hosts. Ecology. Predators. Habitat. Man made habitat. Land zones. Palaearctic region. Eurasia. Europe. Insecta (Arthropoda): Predator, Host, Parasite, Prey; Hymenoptera (Insecta): Parasite; Tachinidae (Cyclorrhapha): Parasite; Mermithidae (Nematoda): Parasite. Hymenoptera, Mermithidae, Tachinidae: Insect hosts, Host parasite list, pathology, Cultivated land habitat, Agroecosystems, Romania; Insecta: Damage to crops, pathology, Food plants, Cultivated crops, Insect prey, Predator prey list, predation impact, Nematode parasites, Mermithidae, Dipteran parasites, Tachinidae, Hymenopteran parasites, Host parasite list, Plant hosts, Insect predators, Cultivated land habitat, Agroecosystems, Romania. ST Animalia, Arthropoda, Insecta, Diptera, Brachycera, Cyclorrhapha; Animalia, Nematoda. Arthropods; Hymenopterans; Insects; Invertebrates; Nematodes; True Flies. none2006