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U.S. Forest Service
Caring for the land and serving people
Caring for the land and serving people
United States Department of Agriculture
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The balsam woolly aphid problem in Oregon and Washington.
Author(s): Norman E. Johnson; Kenneth H. Wright
Date: 1957
Source: USDA Forest Service PNW Old Series Research Paper No. 18: 1-34
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
PDF: View PDF (2.5 MB)Description
A European insect, commonly called the balsam woolly aphid or chermes, is damaging and killing true fir (Abies) in western Oregon and Washington. Some 350,000 acres are known to be infested. Tree killing has reached the point where concerted action is needed. Major salvage plans are being developed by private, state, and federal forest managers to utilize as much of the dead and dying timber as possible. Studies of the insect and means of controlling it are underway and are being expanded.Publication Notes
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Citation
Johnson, Norman E.; Wright, Kenneth H. 1957. The balsam woolly aphid problem in Oregon and Washington. USDA Forest Service PNW Old Series Research Paper No. 18: 1-34Related Search
- Assessment of balsam woolly adelgid damage to eastern Washington and Oregon subalpine fir (Project WC-F-07-01)
- Survey for balsam woolly adegid in Washington and Oregon.
- Growth of suppressed grand fir and Shasta red fir in central Oregon after release and thinning—10-year results.
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