Learn more about TCD in your state





National and State Maps of TCD

National and State Maps

California Information

The Plant Pest Diagnostics Center confirmed the presence of TCD in California in August, 2009.


No quarantine has yet been enacted in California. Be sure to check out the additional resources section to see how you can help limit the spread of TCD.

Reporting TCD

Please report any possible detections to your agricultural commissioner's office or to your local University of California Cooperative Extension office.

Additional Resources

Latest News

Walnut Twig Beetle Detected in Indiana - Apr. 09, 2015

MD implements TCD quarantine in Cecil County - Jan. 12, 2015

PA expands TCD quarantine to include Lancaster County. - Nov. 03, 2014

TCD fungus found on S. pallidus weevil in Indiana. Walnut twig beetle not yet detected. - Jun. 19, 2014

Read More TCD News...