Fourteen parasitoid species were recovered from strawberry leafroIler,Ancylis comptana(Froelich), larvae and pupae collected in central Iowa strawberry fields in 1987 and 1989. Parasitism by the two most abundant parasitoid species,Itoplectis conquisitor(Say) (Hymenoptera: Ichneumonidae) andPediobius facialis(Giraud) (Hymenoptera: Eulophidae), was synchronous with highA. comptanapupal densities. This is the first study in North America in whichI. conquisitorandP. facialiswere the predominant parasitoids attacking immatureA. comptana. In 1987, cumulative percentage parasitism of the firstA. comptanageneration increased to 7% on 24 June. In 1989, the cumulative percentage parasitism of the first larval generation increased to 5.5% on 23 June. Because strawberries have a relatively high tolerance forA. comptanaleaf rolling and feeding activity, naturally occurring parasitoids should be conserved.