Northeast
- University of Connecticut Plant Diagnostic Laboratory
- University of Delaware – Plant Diagnostic Clinic
- University of Maine Insect and Plant Disease Diagnostic Lab
- University of Massachusetts (Amherst) Plant Diagnostics Laboratory
- University of New Hampshire Plant Diagnostic Lab not accepting samples. Samples should be sent to UMaine diagnostic lab.
- New York State Cornell University Plant Disease Diagnostic Clinic
- Penn State (Pennsylvania) Plant Disease Clinic
- University of Rhode Island Plant Protection Clinic
- Rutgers (New Jersey) Plant Disease Laboratory
- The University of Vermont Plant Diagnostic Clinic
- West Virginia University Extension Plant Diagnostic Clinic
Midwest
- University of Illinois Plant Clinic
- Indiana – Purdue University Plant and Pest Diagnostic Laboratory
- Iowa State University Plant and Insect Diagnostic Clinic
- Kansas State University Extension Plant Pathology – Diagnostic Lab
- Michigan State University Diagnostic Services
- University of Minnesota Plant Disease Clinic
- University of Missouri Plant Diagnostic Clinic
- University of Nebraska – Lincoln Plant and Pest Diagnostic Clinic
- North Dakota State University Plant Diagnostic Lab
- The Ohio State University C. Wayne Ellett Plant and Pest Diagnostic Clinic
- South Dakota State University Plant Diagnostic Clinic
- The University of Wisconsin-Madison/Extension Plant Disease Diagnostics Clinic (PDDC)
South
- Alabama Plant Diagnostic Lab at Auburn
- Alabama Plant Diagnostic Lab at Birmingham
- The Arkansas Plant Health Clinic
- University of Delaware Plant Diagnostic Clinic
- University of Florida Plant Diagnostic Center
- University of Georgia Plant Disease Clinics
- University of Kentucky Plant Disease Diagnostic Laboratories
- Louisiana State University Plant Diagnostic Center
- The University of Maryland Plant Diagnostic Laboratory
- Mississippi State University Plant Disease Clinic
- North Carolina State University Plant Disease & Insect Clinic
- Oklahoma State University Plant Disease & Insect Diagnostic Lab
- South Carolina – Clemson University Plant Problem Clinic
- The University of Tennessee Soil, Plant and Pest Center
- Texas A&M Plant Disease Diagnostic Lab
- Virginia Tech Plant Disease Clinic
West
- University of Alaska Fairbanks Pest Identification Services
- Arizona Plant Diagnostic Network
- University of California Davis Plant Disease Diagnostic Clinic
- Colorado State University Plant Diagnostic Clinic
- University of Hawaiʻi at Mānoa Agricultural Diagnostic Service Center
- University of Idaho Identification and Diagnostic Services
- Montana State University Schutter Diagnostic Lab
- Nevada Department of Agriculture Laboratory Services
- New Mexico State University Plant Diagnostic Clinic
- Oregon State University Plant Pathology Diagnostic Services
- Utah Plant Pest Diagnostic Lab
- The Washington State University Plant Pest Diagnostic Clinic
- The University of Wyoming Extension Plant Disease Diagnostic Clinic
