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The Rate of Crown Fade of Trees Killed by the Douglas-Fir Beetle in Southwestern Oregon

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Abstract:

Foliage of Douglas-fir trees, observed for two seasons following lethal attack by the Douglas-fir beetle turned color at different rates depending upon weather patterns. In 1964, a cool and wet year, some killed trees faded in July, but most did not turn until after May 1965 and continued until that fall. In 1965, a warmer and drier year, 70 percent of the trees attacked in the spring were red by October as compared to 25 percent in the same month a year previously. By July 1966, all trees attacked the previous year were bare.

Document Type: Journal Article

Affiliations: Associate Professor of Entomology, Cornell University

Publication date: January 1, 1969

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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