Mortality and Deterioration of Looper-Killed Hemlock in Western Washington

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Abstract:

Mortality and deterioration rates of western hemlocks killed in 1963 in western Washington by hemlock looper (Lambdina fiscellaria lugubrosa Hulst.) were similar to those reported more than a decade earlier in British Columbia. Over 60 percent of trees with 70 percent or more of their foliage consumed by the insects died within 3 years. After 2 years 20 percent of the volume of dead standing trees was lost to decay, whereas trees felled while green and left on the ground for 2 years lost only 1 percent.

Document Type: Journal Article

Affiliations: Forest Entomologist, Washington State Dep. of Natural Resources, Olympia

Publication date: March 1, 1970

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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