For 36 years after an outbreak of Douglas-fir tussock moth Orgyia pseudotsugata (McDunnough), radial growth of defoliated white fir trees, Abies concolor (Gord. & Glend.) Lindl., was significantly greater than that of non-defoliated host trees nearby. The increased growth was probably due to the thinning effect of tree mortality and increased nutrient cycling.
Document Type: Journal Article
Supervisory Research Entomologist at the Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Portland, Oregon
Publication date: January 1, 1980
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