Leafrollers of the genus Choristoneura (Lepidoptera: Tortricidae) comprise 17 species in the Nearctic region and include such serious agricultural and forestry pests as the spruce budworm (C. fumiferana), western spruce budworm (C. occidentalis), large aspen tortrix (C. conflictana), jack pine budworm (C. pinus) and obliquebanded leafroller (C. rosaceana). Natural control factors that help to keep populations of these pests in check include endoparasitoids of several insect families, in particular the Tachinidae (Diptera), Braconidae (Hymenoptera) and Ichneumonidae (Hymenoptera). There are about 25 species of Tachinidae that have been reported from Nearctic Choristoneura species but only about half of these are commonly recorded; the other half represent rare or accidental parasitism of Choristoneura species or dubious records. An illustrated identification guide is under preparation to separate the adults and puparia of the confirmed tachinid parasitoids of Nearctic Choristoneura species. The guide will include an illustrated key, digitally enhanced images of the adult and puparium of each species, and information on the life history of each species.
Species 1: Diptera Tachinidae Actia interrupta
Species 2: Lepidoptera Tortricidae Choristoneura rosaceana (obliquebanded leafroller)
Species 3: Lepidoptera Tortricidae Choristoneura occidentalis (western spruce budworm, spruce budworm)
Keywords: biological control, parasitoid
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