The are now available on the APHIS website. TCD is a disease complex that threatens millions of black walnut trees (Juglans nigra) in forests and urban areas in the United States. The disease is the result of the combined activity of a fungus (Geosmithia morbida) and the walnut twig beetle (Pityophthorus juglandis). For more information about TCD, please visit http://www.thousandcankers.com or contact: Bill Wesela, National Policy Manager, 301-851-2229, William.D.Wesela@usda.govBruce Moltzan, National Program Leader: Forest Pathology, 703- 605-5336, bmoltzan@fs.fed.us
Source: U.S. Department of Agriculture Animal and Plant Health Inspection Service
