Evaluation of Mold and Termite Resistance of Included Sapwood in Eastern Redcedar
Keywords:Eastern redcedar, included sapwood, mold resistance, termite resistance, wood properties
AbstractThe heartwood of eastern redcedar (Juniperus virginiana) frequently contains areas of light-colored wood. This "included sapwood" is considered to be a defect by some manufacturers. In this study, sapwood, included sapwood, and heartwood samples from five eastern redcedar trees were exposed to mold fungi or subterranean termites in a no-choice feeding test. Specific gravity, extractives content, and total volumetric shrinkage were also measured. The extractive content, specific gravity, and volumetric shrinkage values of sapwood and included sapwood were equivalent. Greater extractive content in heartwood blocks was associated with less volumetric shrinkage and greater specific gravity. Included sapwood showed the same resistance to mold growth as heartwood, which was more mold-resistant that the sapwood. Included sapwood, heartwood, and sapwood of redcedar all exhibited resistance to termite attack compared with pine wood controls.
Adams RP (1987) Investigation of Juniperus species of the United States for new sources of cedarwood oil. Econ Bot 41:48-54.nAdams RP, McDaniel CA, Carter FL (1988) Termiticidal activities in the heartwood, bark/sapwood and leaves of Juniperus species from the United States. Biochem Syst Ecol 16:453-456.nASTM (1998) D 3345-08. Standard test methods for laboratory evaluation of wood and other cellulosic materials for resistance to termites. American Society for Testing and Materials, West Conshohocken, PA.nASTM (2007) D 1105-96. Standard test method for preparation of extractive-free wood. American Society for Testing and Materials, West Conshohocken, PA.nAWPA (2007) E-1 06. Standard method of laboratory evaluation to determine resistance to subterranean termites. American Wood-Preservers' Association, Inc., Birmingham, AL.nAWPA (2010) E-24 06. Standard method of evaluating the resistance of wood product surfaces to mold growth. American Wood-Preservers' Association, Inc., Birmingham, AL.nBauch J, Puls J, Klupsch R, Vogel C (2004) Biological and chemical characteristics of ‘included sapwood’ of Juniperis virginiana L. Holzforschung 58:74-81.nCarter FL, Smythe RV (1974) Feeding and survival responses of Reticulitermes flavipes (Kollar) to extractives of wood from 11 coniferous genera. Holzforschung 28:41-45.nEller FJ, Clausen CA, Green F, Taylor SL (2010) Critical fluid extraction of Juniperus virginiana L. and bioactivity of extracts against subterranean termites and wood-rot fungi. Ind Crops Prod 32:481-485.nHemmerly TE (1970) Economic uses of eastern red cedar. Econ Bot 24(1):39-41.nHillis W (1987) Heartwood and tree exudates. Springer-Verlag, Berlin, Germany. 268 pp.nKard B, Hiziroglu S, Payton ME (2007) Resistance of redcedar panels to damage by subterranean termites (Isoptera: Rhinotermitidae). Forest Prod J 57:74-79.nLawson ER (1985) Eastern redcedar, an American wood. FS-260. USDA For Serv. http://www.fpl.fs.fed.us/documnts/usda/amwood/260eredc.pdf'>http://www.fpl.fs.fed.us/documnts/usda/amwood/260eredc.pdfnMagel E, Jay-Allemand C, Ziegler H (1994) Formation of heartwood substances in the stemwood of Robinia pseudoacacia L. II. Distribution of nonstructural carbohydrates and wood extractives across the trunk. Trees (Berl) 8(4):165-171.nMcGinnes EA Jr., Kandeel SA, Szopa PS (1969) Frequency and selected anatomical features of included sapwood in eastern red cedar. Wood Sci 2:100-106.nMorales-Ramos J, Rojas MG (2001) Nutritional ecology of the formosan subterranean termite (Isoptera: Rhinotermitidae): Feeding response to commercial wood species. J Econ Entomol 94:516-523.nPanshin AJ, De Zeeuw C (1980) Textbook of wood technology. McGraw-Hill, Inc., New York, NY. 722 pp.nShigo AL, Hillis WE (1973) Heartwood, discolored wood, and microorganisms in living trees. Ann Rev Phytopathol 11:197-222.nShortle WC (2001) CODIT. Pages 233-234 in OC Maloy and TD Murray, eds. The encyclopedia of plant pathology. John Wiley & Sons, New York, NY.nShortle WC, Dudzik KR, Smith KT (2010) Development of wood decay in wound-initiated discolored wood of eastern red cedar. Holzforschung 64:529-536.nTaylor AM, Baek SH, Jeong MK, Nix G (2008) Wood shrinkage prediction using NIR spectroscopy. Wood Fiber Sci 40(2):301-307.nTaylor AM, Gartner BL, Morrell JJ (2002) Heartwood formation and natural durability—A review. Wood Fiber Sci 34(4):587-611.n
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