Title: Dieback of Black Walnut Saplings (Pest Alert)
Author: USDA Forest Service,;
Source: Pest Alert, unnumbered. Newtown Square, PA: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry, In Cooperation With YOur State Agency
Publication Series: Other
Description: Top dieback of black walnut has been observed in 3-7 year old plantations in Illinois, Indiana, and North Carolina. In infected plantations, mortality has averaged 30% of the trees in one growing season. The most common symptom is basal sprouting of the affected trees. Other symptoms include wilted leaves, top dieback, and cankers on the main stem. Bark separation and small holes may be present near the cankered areas. The cause of the dieback has not been conclusively determined; however, a fungus, Fusarium sp., has been isolated from cankered areas of some affected trees.
Keywords: GPO 1977-751-726, Stem canker, basal sprouting, black walnut, infected plantations, basak sprouting, wilted leaves, top dieback, cankers main stem, a fungus, Fusarium sp.,
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USDA Forest Service 0. Dieback of Black Walnut Saplings (Pest Alert). Pest Alert, unnumbered. Newtown Square, PA:U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
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