noneEnter Dolichogenidea mythimna S. and B. (Braconidae: Hymenoptera) is a larval parasitoid and very good biocontrol agent of Armyworm Mythimna separata Fab. (Noctuidae: Lepidoptera). The parasitoid yielded highest number of progeny production when host were exposed in the density of 10 individuals. Host densities 1, 5, 10, 15, 25, and 50 were tried in the laboratory experiments. The results are useful in mass rearing of present parasitoid. BR Techniques. Care in captivity. Parasites diseases and disorders. Parasites. Insect parasites. Hosts. Insect hosts. Ecology. Population dynamics. Dolichogenidea mythimna (Braconidae): Parasite; Mythimna separata (Noctuidae): Host. Dolichogenidea mythimna: Rearing techniques, Mass rearing, host density selection, Lepidopteran hosts, Mythimna separata; Mythimna separata: Hymenopteran parasites, Dolichogenidea mythimna, Host density selection, Population density. ST Animalia, Arthropoda, Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Braconidae; Animalia, Arthropoda, Insecta, Lepidoptera, Glossata, Heteroneura, Noctuoidea, Noctuidae. Arthropods; Hymenopterans; Insects; Invertebrates; Lepidopterans.