WPDN compact logoThe WPDN Regional Center is located at the University of California, Davis in partnership with the California Department of Food and Agriculture Plant Pest Diagnostic Center (CDFA-PPDC). 

The WPDN Regional Center Lab in CDFA-PPDC is one of the largest plant pest diagnostics laboratories in the USA. It offers all main plant diagnostic disciplines (Botany, Entomology, Nematology, Plant Pathology and Seed), and in-house molecular biological testing capabilities.

Regional Center Leadership Address

Neil McRoberts
Professor of Plant Pathology
Director, WPDN

Tania Brenes-Arguedas
Associate Director, WPDN

Department of Plant Pathology
University of California
One Shields Ave
Davis, CA 95616

Contact us: wpdn@npdn.org 
Phone: (530) 754-2255

Umesh Kodira
Branch Chief
CDFA Plant Pest Diagnostics Center

Plant Pest Diagnostics Center
3294 Meadowview Road
Sacramento, CA 95832
Phone: 916-262-1100
Fax: (916) 262-1190