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June 13-15, 2017 - Thousand Cankers Disease Research and Management Operational Meeting
This meeting will be held at the Courtyard by Marriott in Lafayette, Indiana. It is supported by the Central Plant Board , Southern Plant Board, USDA Forest Service Forest Health Protection, USDA Forest Service R&D, and the Hardwood Tree Improvement & Regeneration Center at Purdue University. Learn more
Thousand Cankers Disease Survey Guidelines
The Thousand Cankers Disease Survey Guidelines for 2017 and Thousand Cankers Disease Survey Forms are now available.
Thousand Cankers Disease
Thousand cankers disease (TCD) is a disease complex native to the western United States and primarily affects black walnut Juglans nigra. This disease is the result of the combined activity of a fungus (Geosmithia morbida) and the walnut twig beetle (Pityophthorus juglandis).
Thousand cankers disease currently threatens millions of black walnut trees in forests and urban areas, an important species with great economic and ecological value throughout its native range. Several quarantines have been established in an attempt to prevent the disease from spreading.
This site is a collaborative effort between the Northeastern Area State and Private Forestry, the USDA Forest Service Northern Research Station, the Purdue University Department of Forestry and Natural Resources, the Hardwood Tree Improvement and Regeneration Center, the American Walnut Manufacturers Association, and the Walnut Council.