NPDN Logo NPDN National Repository
Welcome to the NPDN National Repository

The National Plant Diagnostic Network (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

For more information on the NPDN project visit the public website at

To request access to the NPDN National Repository contact NPDN staff at