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


    The aim of this study was to evaluate the change in colorimetric patterns and the termite resistance of lightcolored and low durability wood when impregnated with teak (Tectona grandis) heartwood extractives. Hot water and ethanol extracts were obtained from 20-year-old teak heartwood and used to evaluate the influence on color change and the natural resistance of 10-year-old teak sapwood and Pinus sp. For wood impregnation, a full-cell (Bethell) treatment was conducted. To verify the influence of the teak extracts, the colorimetric patterns of wood were determined using the Munsell and CIE-L*a*b* systems. Choice and no-choice feeding tests were performed under laboratory conditions to test the efficacy of the teak extract solutions against two termite species Nasutitermes corniger and Cryptotermes brevis. All of the extract solutions promoted a significant darkening of the wood, bringing the color of the impregnated wood closer to older teak heartwood than the untreated samples of the respective species. Ethanol extracts increased the resistance and mortality against N. corniger in both choice and no-choice tests. Resistance to C. brevis was not clearly affected.

    Publication Notes

    • 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.


    Brocco, Victor Fassina; Paes, Juarez Benigno; Costa, Lais Gonçalves da; Kirker, Grant T.; Brazolin, Sérgio. 2020. Wood color changes and termiticidal properties of teak heartwood extract used as a wood preservative. Holzforschung. 74(3): 233-245.


    Google Scholar


    eco-friendly preservative, natural extracts, Tectona grandis, termite resistance, wood color modifier, wood protection

    Related Search

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