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): Charles D. Leaphart; Ed F. Wicker
    Date: 1966
    Source: Canadian Journal of Botany. 44(2): 121-137.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (995.45 KB)

    Description

    Seedlings of Douglas fir, grand fir, western larch, western red cedar, and western white pine were grown in modified environments for four growing seasons to see whether characteristic growth responses of roots and shoots might suggest a cause for pole blight of white pine. Environments included three soil profiles (topsoil, hardpan, and rock) and two moisture regimes (adequate and deficient). Of several variable characteristics of growth, total root weight was the only significant source of variation in diameter and height growth of white pine. Of all five species, white pine also appeared least efficient in competing for moisture on all soil types and was least able to adapt to soils having inadequate available moisture and low potential for recharge. The lack of response to poor environment can result in imbalance of root/shoot ratios. If this imbalance of root/shoot ratios can subsequently cause internal physiological stresses during droughty periods, these stresses, in turn, may cause deterioration of the root system and consequent decline in tree vigor, both of which usually precede appearance of pole blight.

    Publication Notes

    • You may send email to rmrspubrequest@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

    Leaphart, Charles D.; Wicker, Ed F. 1966. Explanation of pole blight from responses of seedlings grown in modified environments. Canadian Journal of Botany. 44(2): 121-137.

    Keywords

    pole blight, seedlings, white pine

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/49012