Save The Date!

The NPDN will convene in Washington, DC in 2016 for the 4th national meeting themed “Advancing Diagnostics to Meet Plant Health Needs”. Please mark your calendars for March 8-12, 2016, for a meeting at the Doubletree, Crystal City. The general itinerary:

  • Tuesday, March 8, 2016: Regional meetings for NEPDN, SPDN, and WPDN
  • Wednesday and Thursday, March 9-10, 2016: National meeting program
  • Friday, March 11, 2016: Field trips
  • Saturday, March 12, 2016: Workshops

Please visit http://conference.ifas.ufl.edu/npdn/ for more information in the coming months, including registration and program details.

Welcome to the National Plant Diagnostic Network Website

The NPDN was established in 2002 in response to the need to enhance agricultural security through protecting health and productivity of plants in agricultural and natural ecosystems in the U.S. With support from the USDA-NIFA and through the collective efforts of many individuals representing Land Grant Universities, federal agencies, state departments of agriculture, and other stakeholders, the NPDN has grown into an internationally respected consortium of plant diagnostic laboratories. The specific purpose of the NPDN is to provide a cohesive, distributed system to quickly detect and identify pests and pathogens of concern. NPDN laboratories immediately report their findings to appropriate responders and decision makers. To accomplish this mission, the NPDN has invested in diagnostic laboratory infrastructure and training, developed an extensive network of first detectors through education and outreach, and enhanced communication among public agencies and stakeholders responsible for responding to and mitigating new outbreaks. We invite you to explore our website to learn more about the NPDN and our programs.


Colorado Kansas Montana North Dakota Nebraska Oklahoma South Dakota North Texas Wyoming Iowa Illinois Indiana Michigan Minnesota Missouri Ohio Wisconsin Connecticut Delaware Massachusetts Maryland Maine New Hampshire New Jersey New York Pennsylvania Rhode Island Vermont West Virginia Alabama Arkansas Florida Georgia Kentucky Louisiana Mississippi North Carolina Puerto Rico South Carolina Tennessee Texas - South Virginia Virgin Islands Alaska American Samoa Arizona California Guam Hawaii Idaho Nevada New Mexico Oregon Utah Washington NPDN Map



This webpage was created to inform the general public of the existence of the National Plant Diagnostic Network (NPDN) and to facilitate NPDN committee function, activities, and organization.

Information available to the general public resides on this home page. Additionally, each of the 5 regions has their own regional website that may contain regionally specific information. Regional websites can be accessed by selecting the regional acronym from the “NPDN Web Ring” box located on the left-hand side of this screen.

Questions about this program from the public should be directed to the following contacts:

1. Ray Hammerschmidt, Executive Director, NPDN, Director, NCPDN, Michigan State University

2. Martin Draper, National Program Leader, National Institute of Food & Agriculture, USDA

3. Carrie Harmon, Secretary NPDN, University of Florida

For more information about accessibility of this web site click here.

Information on the impact of the NPDN

Impact of the NPDN Fact Sheet 9-16-11

National Impact of the NPDN with Plant Inspection Information 9-16-11

NPDN PPV Case Study

NPDN Asian Soybean Rust Case Study

NPDN P. ramorum Case Study

How diagnostic networks and interagency partnerships protect plant systems from pests and pathogens

Diagnostic Laboratories

Diagnostic Laboratories by State:

For multiple laboratory listings by state, please refer to each regional web site.

GPDN=Great Plains NCPDN=North Central NEPDN=Northeast SPDN=Southern WPDN=Western
Alabama (SPDN) Maine (NEPDN) Oregon (WPDN)
Alaska (WPDN) Maryland (NEPDN) Pennsylvania (NEPDN)
Arizona (WPDN) Massachusetts (NEPDN) Puerto Rico (SPDN)
Arkansas (SPDN) Michigan (NCPDN) Rhode Island (NEPDN)
California (WPDN) Minnesota(NCPDN) South Carolina (SPDN)
Colorado (GPDN) Mississippi (SPDN) South Dakota (GPDN)
Connecticut (NEPDN) Missouri (NCPDN) Tennessee (SPDN)
Delaware (NEPDN) Montana (GPDN) Texas (GPDN)
Florida (SPDN) Nebraska (GPDN) Texas (SPDN)
Georgia (SPDN) Nevada (WPDN) Utah (WPDN)
Hawaii (WPDN) New Hampshire (NEPDN) Vermont (NEPDN)
Idaho (WPDN) New Jersey (NEPDN) Virgin Islands - US (SPDN)
Illinois (NCPDN) New Mexico (WPDN) Virginia (SPDN)
Indiana (NCPDN) New York (NEPDN) Washington (WPDN)
Iowa (NCPDN) North Carolina (SPDN) West Virginia (NEPDN)
Kansas (GPDN) North Dakota (GPDN) Wisconsin (NCPDN)
Kentucky (SPDN) Ohio (NCPDN) Wyoming (GPDN)
Louisiana (SPDN) Oklahoma (GPDN)  
American Samoa (WPDN)    
Guam (WPDN)