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Title: Defects in birch associated with injuries made by Xyloterinus politus Say.
Author: Shigo, Alex L.;
Source: Research Note NE-49. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-7
Publication Series: Research Note (RN)
Description: The purpose of this note is to give a brief pictorial description of the internal defects in paper birch (Betula papyrifera Marsh.) and yellow birch (B. alleghaniensis Britt.) that are associated with external signs of infestation by the ambrosia beetle Xyloterinus politus (fig. 1). The information was gained during studies of trees growing in the White Mountains of New Hampshire.
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Shigo, Alex L. 1966. Defects in birch associated with injuries made by Xyloterinus politus Say. Research Note NE-49. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-7
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