Parasitism of Gypsy Moth (Lepidoptera: Lymantriidae) Pupae on the Delmarva Peninsula with Emphasis on Coccygomimus disparis (Hymenoptera: Ichneumonidae)

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Collections of gypsy moth pupae were made on the Delmarva Peninsula during 1989-1994. for the purpose of recovering the recently introduced pupal parasite Coccygomimus disparis (Viereck). Habitats sampled included forests and woodlands, residential forest openings, parks or small woodlots within residential areas, and residences in suburban areas. This species was recovered in all regions of the peninsula, but it did not seem to be associated with any particular habitat. Parasitism was usually low, <1%, but averaged 4.5% in 1990. Levels of parasitism by this species did not seem to be affected by host density, habitat, or latitude. Discriminant analysis suggested that sample size, minimum temperature the previous December, minimum temperature the previous February, June rainfall and site location (upper or lower peninsula) were the most important factors affecting recoveries of this species. Moth emergence was generally high, averaging 54%. Other sources of mortality (average percentages) were desiccation (16.6%), disease (14.4%), parasitism by other species (3.8%), and unknown causes (9.8%).

Document Type: Research Article

Publication date: December 1, 1997

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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