Surveys for parasitoids attacking larvae and pupae of Pieris brassicae (L.) (Lepidoptera: Pieridae) were conducted in the Brassica agro-ecosystem in the Urmia region, northwest of Iran, between 2008 and 2009. Parasitized hosts were collected from infested plants placed in Brassica crops during the growing season (June-October), and from the natural P. brassicae population on the common weeds Capparis spinosa L. (Capparaceae), Crambe orientalis L. (Brassicaceae) and Raphanus raphanistrum L. (Brassicaceae) during the summer production break (December). Ten species of primary parasitoids - Cotesia glomerata (L.) (Hym., Braconidae), Brachymeria femorata Panzer (Hym.: Chalcididae), Aprostocetus taxi Graham (Hym.: Eulophidae), Agrothereutes adustus Grav., Blapsidotes vicinus Grav., Hyposoter clauses Brischke (Hym.: Ichneumonidae), Pteromalus puparum (L.) (Hym.: Pteromalidae) and Exorista larvarum (L.), Exorista segregata Rondan, Phryxe vulgaris Fallén (Dip.: Tachinidae) were identified. The most numerous were P. puparum (with 49.65% in 2008 and 46.13% in 2009) and C. glomerata (with 43.45% and 45.57% in 2008 and 2009, respectively). The following species: A. adustus, A. taxi, B. vicinus, B. femorata, H. clauses and P. vulgaris, were newly recorded for the Iranian fauna. With the exception of B. femorata and P. vulgaris, all of the above mentioned species were recorded for the first time as parasitoid on P. brassicae from Iran.
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