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Pest and Disease Identification
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Figure 1
Wilting black walnut in the last stages of TCD. |
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Figure 2
Small branch cankers caused by G. morbida. |
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Figure 3
Exit holes made by adult WTB. |
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Figure 4
Walnut twig beetle-top and side view. |
Steve Valley, Oregon Department of Agriculture from USFS Pest Alert: Thousand Cankers Disease, February 2013 |
Contact:
William Wesela
National Policy Manager
301-851-2229
E-mail: William.D.Wesela@aphis.usda.gov