not in Young Hymenopterous parasitoids of the pea leafminer, Chromatomyia horticola Goureau, were identified on pea crop during rabi 2002 at Pantnagar, Uttaranchal. The species. found associated were: Diglyphus horticola Khan , Pediobius sp. and Euderus agromyzae (Gan.) (Eulophidae), Opius sp. (Sraconidae) and an unidentified pteromalid. Parasitoid activity was initiated in the first week of February, peaked during second week of March (54% parasitization) and declined later. The practical implications of the results are discussed. BR Parasites diseases and disorders. Parasites. Insect parasites. Hosts. Insect hosts. Habitat. Man made habitat. Land zones. Oriental region. Eurasia. Asia. India. Chromatomyia horticola (Agromyzidae): Host, Parasite; Opius (Braconidae): Parasite; Pteromalidae (Chalcidoidea): Parasite; Diglyphus horticola (Eulophidae): Parasite; Euderus agromyzae (Eulophidae): Parasite; Pediobius (Eulophidae): Parasite. Chromatomyia horticola: Hymenopteran parasites, Recorded and seasonal changes in prevalence, plant host, cultivated land, Plant hosts, Pea, Cultivated land habitat, Uttaranchal, Pantnagar; Diglyphus horticola, Euderus agromyzae, Opius, Pediobius, Pteromalidae: Dipteran hosts, Chromatomyia horticola, Recorded and seasonal changes in prevalence, plant host, cultivated land, Cultivated land habitat, Uttaranchal, Pantnagar. ST Insecta, Diptera, Brachycera, Cyclorrhapha, Agromyzidae; Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Braconidae; Insecta, Hymenoptera, Apocrita, Terebrantia, Chalcidoidea, Eulophidae. Arthropods; Hymenopterans; Insects; Invertebrates; True Flies. none2003