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): Peter Laks; Peggy A. McKaig; Richard W. Hemingway
    Date: 1988
    Source: Holzforschung 42(5):299-306
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.5 MB)

    Description

    The condensed tannins are natural wood preservatives found in high concentrations in the bark and wood of some tree species. Condensed tannin-containing bark extracts from loblolly pine (Pinus taeda) were evaluated as wood preservatives using standard methods. Bark extracts by themselves did not cause any reduction in weight loss of pressure-treated wood blocks at the retentions tested. However, they do have efficacy as wood preservatives when complexed with copper(II) ions. The best experimental wood preservative formulation was a dual treatment using a sulphited bark extract first, followed by a CuCl2 treatment. At some retentions, this method yielded wood blocks with greater resistance to decay by Coriolus versicolor than pentachlorophenol. A single stage treatment of extract plus copper using an aqueous ammoniacal solvent was also successful but not as effective as the dual treatment.

    Publication Notes

    • You may send email to pubrequest@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

    Laks, Peter; McKaig, Peggy A.; Hemingway, Richard W. 1988. Flavanoid biocides: Wood preservatives based on condensed tannins. Holzforschung 42(5):299-306

    Keywords

    Wood preservative, procyanidin, bark extract, chelate, condensed tannin, copper, loblolly pine, Pinus taeda, Gloeophyllum trabeum, Coriolus versicolor

    Related Search


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