Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Gerard M. Thomas
    Date: 1957
    Source: PNW Old Series Research Notes No. 150, p. 1-4
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (210 KB)

    Description

    In 1947, an outbreak of silver fir beetles, Pseudohylesinus grandis Sw. and P. granulatus (Lec.), was discovered in northwestern Washington. The epidemic flourished for the next six years, killing some 525 million board-feet of Pacific silver fir, Abies amabilis (Dougl.) Forbes. Prior to 1947, the silver fir beetles were considered to be of little economic importance because they had been observed to attack only slash, windthrows, and suppressed or otherwise weakened trees. While the recent destructive outbreak was in progress, it was reasoned that some factor or factors might have weakened the trees sufficiently so that these relatively non-aggressive beetles could kill them. Climate was suspected as a factor in weakening the trees. A study was undertaken, therefore, to determine whether a relationship existed between tree growth and weather patterns before and during the beetle outbreak.

    Publication Notes

    • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • 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.

    Citation

    Thomas, Gerard M. 1957. Climate and growth rate as related to an outbreak of silver fir beetles. PNW Old Series Research Notes No. 150, p. 1-4

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page