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National and State Maps of TCD

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Welcome to ThousandCankers.com! Interested in the latest news about thousand cankers disease? Read more..

Photo: Curtis Utley, CSUE, Bugwood.org

Thousand Cankers Disease is caused by the combined activity of a fungus (Geosmithia morbida) and the walnut twig beetle (Pityophthorus juglandis). Read more..

Photo: Curtis Utley, CSUE, Bugwood.org

Interested in purchasing or transporting walnut? Stay up to date with quarantines. Read more..

Photo: Whitney Cranshaw, Colorado State University, Bugwood.org

Need help with identification and the symptoms of TCD? Read more..

Photo: Whitney Cranshaw, Colorado State University, Bugwood.org

Welcome to Thousandcankers.com!

Our goal is to help you find answers to your questions about thousand cankers disease. Feel free to browse our content and send us some feedback if you find any errors, or have some content you would like to contribute. Remember to check back often as we update this site regularly with the latest information and developments on thousand cankers disease of walnut.

May TCD Webinar Recordings Now Available

The US Forest Service hosted the last of three webinars in a series on Thousand Cankers Disease on Thursday, May 30. This seminar series on is for landowners, extension educators, and natural resource professional.

The recordings for this webinar are now available and can be viewed from our webinar page for this meeting.

Thousand Cankers Disease Survey Guidelines

We have recently added the revised Thousand Cankers Disease Survey Guidelines for 2013 to our list of technical publications. This document provides guidance on standardized techniques for USDA Forest Service and Plant Protection and Quarantine supported surveys.

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.

Our Partners

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.

Latest News

Ohio adds Butler County to TCD Quarantine - Dec. 19, 2013

First record of TCD in Europe - Dec. 11, 2013

Tenessee expands quarantine to include Morgan and Rhea counties. - Nov. 06, 2013

TCD confirmed in Ohio. Citizens encouraged to check trees for signs of invasive pests. - Aug. 12, 2013

Read More TCD News...