Durability of a Changing Western Redcedar Resource<sup>1</sup>

Authors

  • Camille M. Freitag
  • Jeffrey J. Morrell

Keywords:

Western redcedar, decay resistance, sapwood/heart wood interface, antimicrobial compounds, effect of tree age

Abstract

The heartwood of western redcedar (Thuja plicata) is known for its natural resistance to fungal attack, but some users of western redcedar utility poles have suggested that its durability may be diminished as suppliers begin to harvest trees from younger stands. The decay resistance of western redcedar samples from the Pacific Northwest and Idaho was tested by using Postia placenta in a soil block test. Weight losses varied widely among and between sites and were not correlated with position in the heartwood cross section, tree age, or silvicultural factors. With results similar to those from a 1957 study, we can infer that the durability of the currently used younger material has not changed from that of earlier, older stocks.

References

Anderson, A. B., T. C. Scheffer, and C. Duncan. 1962. On the decay retardant properties of some tropolones. Science137(3533):859-860.nBamber, R. K. 1976. Heartwood, its function and formation. Wood Sci. Technol.10:1-8.nClark, J. W., and T. C. Scheffer. 1983. Natural decay resistance of the heartwood of coast redwood Sequoia sempervirens (D. Don) Endl. Forest Prod. J.33(5):15-20.nDeBell, J. D., J. J. Morrell, and B. L. Gartner. 1999. Within-stem variation in tropolone content and decay resistance of second-growth western redcedar. Forest Sci.45:101-107.nEades, H. W., and J. B. Alexander. 1934. Western redcedar: Significance of its heartwood colorations. Forest Serv. Circ.41. Dept. of the Interior, Ottawa, Canada. 17 pp.nEnglerth, G. H., and T. C. Scheffer. 1954. Tests of decay resistance of four western pole species. Rep. 2006. USDA Forest Serv. Prod. Lab., Madison, WI. 11 pp.nEnglerth, G. H., and T. C. Scheffer. 1955. Tests of decay resistance of four western pole species. J. Forestry53:556-561.nJin, L., B. J. Van Der Kamp, J. Wilson, and E. J. Swan. 1988a. Biodegradation of thujaplicins in living western redcedar. Can. J. For. Res.18(6):782-786.nJin, L., J. W. Wilson, and E. P. Swan. 1988b. Thujin, a novel lactone from the discolored heartwood of Thuja plicataDonn. Can. J. Chem.66:51-53.nLindgren, P. A. 1989. Bonneville Power Administration's Wood Pole Management Program. Pages I1-I14 in Proc. International Pole and Piling Conf., Fort Collins, CO.nNault, J. 1988. Radial distribution of thujaplicans in old growth and second growth western redcedar (Thuja plicata D. Don). Wood Sci. Technol.22(1):73-80.nNewbill, M. A., and J. J. Morrell. 1993. Ability of over the-counter preservatives to protect western wood species from fungal attack. Forest Prod. J.43(10):35-40.nRennerfelt, E. 1948. Thujaplicin, a fungicidal substance in the heartwood of Thuja plicata. Physiol. Plant.1:245-254.nRoff, J. W., E. I. Whitaker, and H. W. Eades. 1962. Decay resistance of western redcedar: Relative to kiln seasoning, color, and origin of the wood. Tech. Note 32. Forest Prod. Res. Branch, Canadian Dept. of Forestry, Vancouver, B.C. 19 pp.nScheffer, T. C. 1957. Decay resistance of western redcedar. J. Forestry55:434-442.nScheffer, T. C. 1981. Decay resistance of Alaska cedar. Forest Prod. J.33(1):25-26.nScheffer, T. C., and E. B. Cowling. 1966. Natural resistance of wood to microbial deterioration. Ann. Rev. Phytopath.4:146-170.nScheffer, T. C., and G. H. Englerth. 1952. Decay resistance of second-growth Douglas-fir. J. Forestry50:439-442.nSoutham, C. M., and J. Ehrlich. 1943a. Decay resistance and physical characteristics of wood. J. Forestry41:666-673.nSoutham, C. M., and J. Ehrlich. 1943b. Effects of extract of western redcedar heartwood on certain wood-decaying fungi in culture. Phytopath.33:517-524.n

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Published

2007-06-05

Issue

Number 1 / January 2001

Section

Research Contributions

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