University of Maryland Extension

Thousand Cankers Disesase

Thousand Cankers Disease found in the Mid-Atlantic

A newly described insect/fungus complex, called thousand cankers disease, has been responsible for the death of thousands of black walnut trees in the western U. S. for at least a decade. In the summer of 2011, the disease was confirmed for the first time in Virginia and Pennsylvania. We are asking Marylanders to be on the lookout for this lethal disease of black walnut trees.

In January 2014, the walnut twig beetle that vectors this disease was found in a park area in Cecil County, Maryland. No confirmation of disease infection has been made at this time.

UME Pest Alert on Thousand Cankers Disease

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