You are here: Home
/ Publication Information
Title: The balsam woolly aphid problem in Oregon and Washington.
Author: Johnson, Norman E.; Wright, Kenneth H.;
Source: USDA Forest Service PNW Old Series Research Paper No. 18: 1-34
Publication Series: Research Paper (RP)
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.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
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: 1-34
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility