Sapstreak Disease and Biodeterioration of Sugar Maple

  • Kevin T. Smith
Part of the Biodeterioration Research book series (BIOR, volume 3)


Logs and lumber decrease in value due to fungi that stain wood as well as from fungi that cause decay. Sapwood within a living tree is subject to a number of discoloring or staining processes involved with tree defense and fungal infection (Shortle, 1984). Although the use of color to typify wood tissues can result in confusion (Shigo, 1986), changes in color are indicative of distinct metabolic processes that once located may then be more precisely characterized. Sap stains are sapwood tissues altered in color due to fungal activity and may occur in the standing tree, cut lumber, or manufactured product (Scheffer and Lindgren, 1940). The sapstreak disease of sugar maple results in a sap stain in the tree that persists in the wood product. Although wood strength is not affected by sapstreak, the stain lowers the commercial value of affected lumber (Ohman and Spike, 1966).


Sugar Maple Foliar Symptom Maple Tree Barrier Zone Column Boundary 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Kevin T. Smith
    • 1
  1. 1.U.S. Department of AgricultureForest Service Northeastern Forest Experiment StationDurhamUSA

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