The Columbian Timber Beetle, Corthylus columbianus (Coleoptera: Scolytidae). VIII. Artifacts and Characteristics of the Host Tree¹

Authors: WHITE, WILLIAM B.; GIESE, RONALD L.

Source: Journal of Economic Entomology, Volume 61, Number 5, October 1968 , pp. 1400-1406(7)

Publisher: Entomological Society of America

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Abstract:

The spatial distribution of Corthylus columbianus Hopkins was studied to determine associations with structural properties of the hosts red maple, Acer rubrum L., and silver maple, A. saccharinum L.

A significant relationship between percent beetle attack and tree height is given by the regression Log (Ŷ + 0.368) = 3.9008 - 1.1378 (Log X) (all size classes grouped) . The mean height above ground of within-tree beetle populations increased 0.42 feet for each I inch increase of tree diameter (over a range of diameters 1-17 inches breast height). Prediction curves were calculated to describe the heights above ground which contain 50, 67, or 90% of the population. As host diameter increased, the probability of attack multiplied exponentially. No host trees with diameters 1 inch or less were infested. The similar infestation patterns of different tree sizes in outbreak compared to nonoutbreak years led to the conclusion that, at least with regard to diameter, initial attack behavior is essentially the same from year to year.

Document Type: Research article

Publication date: 1968-10-01

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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