DIAGRAM: black walnut trees
September 12, 2010 | 4:47 p.m. CDTThousand cankers disease is caused by a fungus that is carried by walnut twig beetles. The fungus spreads and blocks nutrients to the tree, eventually causing the tree to die. The disease has not been discovered in Missouri, but the state has a large native population of Eastern Black Walnut Trees.
RELATED STORIES: Thousand Cankers Disease threatens Missouri black walnut industries