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Title: Hickory Mortality
Author: USDA Forest Service Northern Area State & Private Forestry and Region 8,;
Source: NA-PR-02-94. [Radnor, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Publication Series: Miscellaneous Publication
Description: Mortality of bitternut and shagbark hickory has been observed in Wisconsin since the late 1980's. This is similar to occurrences in the 1960's. The recent tree mortality has been associated with attacks by the hickory bark beetle, Scolytus quadrispinosus Say, and a newly discovered fungus in the genus Ceratocystis (tentatively C. caryae). The fungus can be isolated from sunken bark cankers and discolored wood associated with beetle attacks. In field and greenhouse studies done at the University of Wisconsin, the fungus was found to be highly virulent to bitternut and shagbark hickory, pecan, butternut and black walnut.
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USDA Forest Service Northern Area State & Private Forestry and Region 8 1994. Hickory Mortality. NA-PR-02-94. [Radnor, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
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