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Douglas-fir Progeny Testing for Resistance to Western Spruce Budworm

Informally Refereed

Abstract

Ample evidence exists that inland populations of Douglas-fir suffer varying amounts of defoliation by western spruce budworm (Johnson and Denton 1975; Williams 1967; McDonald 1981). Such variation in plant insect association can be the result of the plant escaping attack in time and place to actual confrontation between plant and insect (Harris 1980). Co-evolved genetic interaction between insect and plant is usually involved in initiation and preservation of plant polymorphisms, whether they be morphological or chemical responses (Gilbert 1982; Berenbaum 1983).

Parent Publication

Citation

McDonald, Geral I. 1983. Douglas-fir Progeny Testing for Resistance to Western Spruce Budworm. In: Talerico, Robert L.; Montgomery, Michael, tech. coords. Proceedings, forest defoliator--host interactions: A comparison between gypsy moth and spruce budworms; 1983 April 5-7; New Haven, CT. Gen. Tech. Rep. NE-85. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 15-16.
https://www.fs.usda.gov/research/treesearch/4115