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APHIS Releases 2020 Thousand Cankers Disease Survey Guidelines

The 2020 Thousand Cankers Disease (TCD) Survey Guidelines 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.gov

Bruce Moltzan, National Program Leader: Forest Pathology, 703- 605-5336, bmoltzan@fs.fed.us


USDA touches the lives of all Americans each day in so many positive ways. In the Biden-Harris Administration, USDA is transforming America’s food system with a greater focus on more resilient local and regional food production, fairer markets for all producers, ensuring access to safe, healthy and nutritious food in all communities, building new markets and streams of income for farmers and producers using climate smart food and forestry practices, making historic investments in infrastructure and clean energy capabilities in rural America, and committing to equity across the Department by removing systemic barriers and building a workforce more representative of America. To learn more, visit www.usda.gov.

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