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Nordin, G. L.

Bionomics of the Juniper Webworm

Digitization Status
Date created
March 1969
Dichomeris marginella (Denis & Schifferrniiller) causes damage in central Illinois principally to Irish juniper by webbing and feeding on the foliage. The insect overwinters as a partially grown larva. The larva resumes feeding in the spring and reaches maturity by mid-May. The pupal stage lasts about 2 weeks. Moth emergence reached a peak in mid-June of 1966 and 1967. Males are strongly attracted by females during the mating period. Apanteles sp., a larval parasite, and Itoplectis conquisitor (Say), a larval-pupal parasite, jointly reduced the juniper webworm population by approximately 10% in the field in 1967.
Volume, Issue, Page Number
62, 2, 287-292