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Black Walnut Mortality in Colorado Caused by the Walnut Twig Beetle and Thousand Cankers Disease

N. Tisserat, W. Cranshaw, D. Leatherman, C. Utley, and K. Alexander

August 2009


We report here on the association of the walnut twig beetle and the canker fungi Geosmithia and Fusarium solani with mortality of black walnut in Colorado, and the potential threat this disease complex could have on black walnut if it were introduced into the native range of this tree species.


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