Cooperative Extension: Plant Disease Diagnostic Lab

The Plant Disease Diagnostic Lab is part of the Pest Management Unit within the UMaine Cooperative Extension Diagnostic and Research Laboratory.  The lab is also a part of the National Plant Diagnostic Network. Submissions to the Plant Disease Diagnostic Lab must include your name, phone number, business name, county, host plant, problem, date when symptoms were noted and good, in-focus images. Use this submission form for physical plant samples. We also accept digital images sent by email (see video below) but we may ultimately need a physical sample in order to make a definitive identification.

To contact the University of Maine Cooperative Extension Plant Disease Diagnostic Lab, call 207.581.3883 or email

Diagnostic Lab Personnel:

  • Dr. Alicyn Smart, DPM — Plant Pathologist & Director of the Plant Disease Diagnostic Laboratory
  • Aashish Dhungana — UMaine undergraduate student, Lab Technician III
  • Sarah Dorey — UMaine undergraduate student, Lab Technician III
  • Ruby Bonilla — UMaine undergraduate student, Lab Technician I

Additional Resources:

Donate to UMaine Extension’s Plant Disease Diagnostic Lab

How to submit plant disease samples via email

We are located at 17 Godfrey Drive in Orono, Maine, just off from Interstate 95, Exit #193 (not far from the Black Bear Inn).


8:00 a.m. – 4:30 p.m., Monday-Friday (closed holidays)