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Animal and Plant Health Inspection Service
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Thousand Cankers Disease Photo Gallery

Pest and Disease Identification

Figure 1
Wilting black walnut in the last stages of TCD.
Figure 2
Small branch cankers caused by G. morbida.
Figure 3
Exit holes made by adult WTB.
Figure 4
Walnut twig beetle-top and side view.
Steve Valley, Oregon Department of Agriculture from USFS Pest Alert: Thousand Cankers Disease, February 2013


William Wesela
National Policy Manager

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