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

Dr. James Woodhall
Regional Center Lab Director

Parma Research and Extension Center
University of Idaho
29603 U of I Lane
Parma, ID 83660-6699