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Title: HOW to Diagnose Black Walnut Damage
Author: Weber, Barbara C.; Anderson, Robert L.; Hoffard, William H.;
Source: Misc. Publ. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Publication Series: Miscellaneous Publication (MISC)
Description: Black walnut trees, like all other plants, are susceptible to a variety of injuries that reduce or destroy their usefulness. The first step in preventing or controlling these injuries is to identify their cause. Most damage is caused by disease, insects, birds, mammals, or weather. Presented here is a method for identifying the most common causes of injury to black walnut trees. It was developed primarily for use by walnut growers or foresters who are not specifically trained in insect or disease identification. The method features a "key" that leads the user step-by-step from the visual symptoms to the culprit responsible. Supplementing the key are brief descriptions of the damages and their causes, illustrated in most cases with line drawings.
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Weber, Barbara C.; Anderson, Robert L.; Hoffard, William H. 0. HOW to Diagnose Black Walnut Damage. Misc. Publ. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
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