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    Author(s): Matthew J. Konkler; Mark A. Newbill; Stan Lebow; Jeffrey J. Morrell
    Date: 2017
    Source: Research Note FPL–RN–0346. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 5 p.
    Publication Series: Research Paper (RP)
    Station: Forest Products Laboratory
    PDF: Download Publication  (944.0 KB)

    Description

    The potential for two solid wood fumigants, dazomet and methylisothiocyanate (MITC), to move through wood at levels sufficient to arrest decay in covered bridges was assessed. Dazomet alone failed to decompose to MITC and move into the wood at effective levels, probably because too little moisture was available for breakdown. Adding a copper accelerant improved dazomet decomposition to the point at which it produced an effective level of chemical up to 600 mm from the point of application. The MITC levels in bridges receiving the active chemical in an aluminum tube were 15 to 20 times the protective levels within 2 years of treatment. Although both chemicals eventually provided protective levels, MITC in aluminum tubes produced the most consistent chemical distribution in the shortest time.

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    Citation

    Konkler; Matthew J.; Newbill; Mark A.; Lebow; Stan T.; Morrell; Jeffrey J. 2017. Performance of two solid fumigants in covered bridges. Research Note FPL–RN–0346. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 5 p.

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    Keywords

    covered bridge, wood decay, fumigant, dazomet, methyisothiocyanate

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