It is almost one year since the Thousand Cankers Disease (TCD) was first discovered in Tennessee near Knoxville. This discovery confirmed fears the disease was traveling eastward, mostly likely through the transportation of firewood and the Tennessee discovery was the first one east of the Mississippi River. (See this post for more information about the original alert.)
TCD affects walnut trees and is a progressive disease that kills a tree within two to three years after initial infection. The disease-causing fungus, Geosmithia morbida, is transmitted by a small twig beetle. Branches and trunk tissue are killed by repeated infections by the fungus, as the beetles carry the fungus into new bark.
Homeowners are urged to be familiar with the signs of a TCD infestation, and the North Central Integrated Pest Management Center has recently published a brochure that provides helpful information. You can download the brochure here. Concerned citizens are urged to contact their local county extension agent. In Hamilton County Tennessee, the Hamilton County Extension Service telephone number is 855-6113.