ABSTRACT
The National Plant Diagnostic Network (NPDN), comprising diagnostic professionals from more than 70 pathology, entomology, and nematology laboratories, safeguards U.S. plant systems through accurate diagnosis and effective communications with clients, partners, and stakeholders. As a USDA-NIFA extension program built on the land-grant university system, the network has dual responsibilities to extension clientele such as farmers and the green industry, as well as state and federal regulatory agencies. Following strategic planning in 2019, the network emerged with a concise plan and strong committees of network participants to enhance and sustain service to NPDN clientele and partners, even through significant disruptions like the 2020 coronavirus pandemic. The commitment to building diagnostic capacity and expertise across the country allows these plant clinics to assist during a response to detections of highconsequence plant pathogens by clearing healthy plants for commerce while identifying potential positives for regulators to quarantine and/or eradicate, similar to the test and trace efforts for human diseases such as COVID-19. In this review, we describe the network’s recent activities to protect U.S. plant agriculture and natural ecosystems and its plans to improve and expand capacity for national plant biosecurity. © 2021 The American Phytopathological Society