 "Meteorus trachynotus") will attack the larvae when they are in their third to fourth instars, emerging during the sixth instar or from the pupae.About 90 parasitoids have been collected from spruce budworm in eastern North America.In 1996, Henry found that the suite of parasitoids collected from spruce budworm in isolated white spruce plantations of southern Ontario differed from the usual suite of parasitoids found in the boreal forest.