The toxicity of pine resin vapors to adult bark beetles was selected as one means of investigating the resistance of pines to these insects. When adults of Dendroctollus brevicomis Lee. were confined to a saturated atmosphere in a 30-cc. test tube, mortality rates differed significantly between species of resins and between resin and turpentine (the liquid commercial derivative of resin). In a 150-cc. screw-cap jar fumigation chamber, D. brevicomis and D. jeffreyi Hopk. were able to tolerate the volatile fraction of their natural host resin, respectively Pinus ponderosa Laws. and P. jeffreyi Grev. and Balf; but neither beetle was able to tolerate the vapors from the other's host resin. With increased time of exposure, neither beetle was able to tolerate the saturated vapors of resin from a P. jeffreyi X ponderosa hybrid. This led to the hypothesis that bark beetles can tolerate the resin vapors of their hosts but cannot tolerate that of a nonhost.
Document Type: Research Article
Publication date: April 1, 1961
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.