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Thousand Cankers Disease

Thousand cankers disease is a new insect vectored disease affecting black walnut.


3 Images
5406044
Whitney Cranshaw
Colorado State University

Black walnut in end stage of thouand cankers. Photograph taken June 25, 2009; tree was removed one week later. During previos September symptoms were flaggong on a single branch. Associated with walnut twig beetle.

5406046
Whitney Cranshaw
Colorado State University

Black walnut showing first external symptom of thousand cankers. A single flagging branch can be seen in the crown area on the upper right of the photograph. Associated with walnut twig beetle.

5406049
Whitney Cranshaw
Colorado State University

Black walnut recently killed by thousand cankers. A healthy pecan is in the background. Associated with walnutt wig beetle.