The Occurrence of Insect Parasites of Choristoneura fumiferana (Clem.), in Oregon¹

Authors: CAROLIN, V. M.; COULTER, W. K.

Source: Journal of Economic Entomology, Volume 52, Number 4, August 1959 , pp. 550-555(6)

Publisher: Entomological Society of America

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Abstract:

To date, 34 species of primary parasites have been recovered from the spruce bud worm (Choristoneura fumiferana (Clem.)) in Oregon. Of these, 15 species are considered of major importance. Analysis of the abundance and distribution of these parasites was based on concepts and methods used in plant sociology.

Within host populations during the period 1953-56, seven species are shown to have increased in density without decreasing in presence, and three species to have increased in presence without decreasing in density . .For one infestation, the frequency of parasite species over the area was found to be consistent with density. Whereas most species are believed to be distributed over the region, it is obvious that conditions within a single infestation may be unfavorable to the multiplication of some species.

Secondary parasitization is suggested as a factor retarding the increase in density of primary parasites during the early stages of an outbreak.

Document Type: Research article

Publication date: 1959-08-01

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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