Toxicity of Pine Resin Vapors to Three Species of Dendroctonus Bark Beetles

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Abstract:

The vapor toxicity or saturated resin vapors of both host and non-host pines was determined for three species of Dendroctonus: D. brevicomis Le Conte, D. monticolae Hopkins, and D. jeffreyi Hopkins. Results with hard pines substantiate the hypothesis that bark beetles of this genus can tolerate saturated vapors of host resin but not of non-host resin, suggesting that resin is a determining factor in host specificity. Results with sort pines do not substantiate the hypothesis, suggesting that other properties of resin or non-resinous characteristics of these pines determine host specificity. A delayed effect in many tests with hard pine host resin suggests that even host resins can be deleterious under certain conditions.

Variable results were obtained with hybrid pines. Resin vapors of non-host non-host hybrids were toxic. D. brevicornis and D. jeffreyi were usually significantly affected by non-hosthost hybrid resin vapors while D. monticolae was not.

The overall results suggest that resin in some capacity may be an important factor in host resistance.

Document Type: Research Article

Publication date: December 1, 1963

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  • 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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