Western Plant Diagnostic Network




About WPDN

The Western Plant Diagnostic Network (WPDN) is a regional member of the larger National Plant Diagnostic Network (NPDN). NPDN consists of five regional plant diagnostic centers located at Cornell University (NEPDN); Michigan State University (NCPDN); Kansas State University (GPDN); the University of Florida (SPDN); and the University of California, Davis in partnership with the California Department of Food and Agriculture, Sacramento (WPDN). Each regional center coordinates data gathering, diagnostic collaboration, and other activities of member land grant institutions, national agencies and state departments of agriculture.

WPDN is a consortium of land grant institutions and state departments of agriculture throughout the western United States and U.S. territories in the Pacific that provide services for plant disease diagnosis, plant identification, and insect/pest identification. WPDN uses a common software interface to process diagnostic requests and share information among diagnostic laboratories.

The WPDN Brochure available here in Adobe Acrobat format


If you see suspicious samples in the field please contact one of the following
  • County Ag Commissioners (California) or county extension agent
  • State Diagnostic Lab
  • State Department of Agriculture
  • Cooperative Extension Specialist

WPDN Members

Alaska Department of Agriculture
American Samoa
Arizona Department of Agriculture
California Department of Food and Agriculture
Hawaii Department of Agriculture
Idaho Department of Agriculture
Republic of the Marshall Islands
CERIS, Purdue University
Nevada Department of Agriculture
New Mexico Department of Agriculture
New Mexico State University
Northern Marianas College
Oregon Department of Agriculture
Oregon State University
Oregon State University IPPC
Republic of Palau

Saipan
University of Alaska
University of Arizona
University of California, Statewide IPM
University of California, Davis
University of Guam
University of Hawaii
University of Idaho
University of Nevada
USDA/CSREES
USDA/APHIS
Utah State University
Washington State University
Washington Department of Agriculture
Western Regional IPM Center, Univ. of California, Davis



Current News

Establishment of Gladiolus Rust (GR) Quarantine for Commercial Gladiolus Farms in
2008-05-02
SPRO & Federal Order

Federal Domestic Quarantine Order for Light Brown Apple Moth, Epiphyas postvittana, Interstate Movement Restrictions
2008-04-28
SPRO Letter
Federal Order
Appendix 1
Appendix 2

Light Brown Apple Moth Program Update: Twist Tie Treatments Scheduled for Santa Clara County; Second Moth Detected in Sonoma County
2008-04-24
CDFA Press Release

Upcoming Events

International IPM Symposium
 Portland, OR
March 24-26, 2009
More Info