Green Horizons

Thousand Cankers Disease in Missouri

Thousand Cankers Disease kills black walnut trees. Help watch for it in Missouri. Missouri's Department of Conservation and Department of Agriculture will once again be evaluating black walnut trees in midsummer for symptoms of thousand cankers disease, which has not yet been detected in Missouri.

How you can help:

• View photos of thousand cankers disease on black walnut at MU Extension's TreePests website (http://extension.missouri.edu/treepests/thousandcankers.aspx).
• Find information about other diseases that affect black walnuts.
• Use the online form to report black walnut trees with symptoms that look like thousand cankers disease.
• Please do not take any samples because it could spread pests.