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    Author(s): Bessie M. Woodward; Cherilyn A. Hatfield; Stan T. Lebow
    Date: 2011
    Source: Research Note FPL-RN-02. Madison, WI : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2011: 120 p.
    Publication Series: Research Note (RN)
    Station: Forest Products Laboratory
    PDF: Download Publication  (1.2 MB)


    This report covers stake test results primarily from Southern Pine 2- by 4- by 18-in. sapwood, treated by pressure and nonpressure processes and installed by Forest Products Laboratory employees and cooperators in decay and termite exposure sites at various times since 1938 at Saucier, Mississippi; Madison, Wisconsin; Bogalusa, Louisiana; Lake Charles, Louisiana; Jacksonville, Florida; and the Canal Zone, Panama. Also included in the tests at Saucier, Mississippi, are smaller pine stakes and those of treated and untreated plywood, particleboard, modified woods, laminated paper plastic, pine infected with Trichoderma mold, plus other selected wood species such as oak, Douglas-fir, and Engelmann spruce. Southern Pine untreated control stakes have had an average life of about 1 year in the Canal Zone, 1.8 to 3.6 years in Mississippi, Florida, and Louisiana, and about 6 years in Wisconsin. Superficial treatments by 3-min dipping and brushing with preservatives such as coal-tar creosote and petroleum oils containing copper naphthenate, zinc naphthenate, and pentachlorophenol have added from a few months to 4 years to the life of the untreated stakes. When appropriate preservative retention levels are applied, creosote, pentachlorophenol, and selected waterborne salt preservatives provide excellent protection. This publication also contains information regarding the future inspection status of the test plots.

    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.


    Woodward, Bessie M.; Hatfield, Cherilyn A.; Lebow, Stan T. 2011. Comparison of wood preservatives in stake tests: 2011 progress report. Research Note FPL-RN-02. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 120 p.


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    Plywood, preservation, wood poles, wood preservatives, Southern pines, Douglas fir, Pseudotsuga menziesii, poles, Pinus, wood preservation, preservatives, pressure treated, nonpressure treated, average life, stake tests

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