Diagnostic Services

The Plant Health Program provides general plant pest and disease diagnostic services for the nursery industry, Christmas tree industry, other governmental agencies, and the general public. 

Plant Diagnostic Services brochure

Find information on plant diagnostic tests and fees. Plant Diagnostic Services brochure

​What tests do we provide?

We can screen for the following plant pathogens: bacteria, fungi, nematodes, phytoplasmas, and viruses. For insect identification services, please contact the Insect Pest Prevention and Management program

How do I submit a sample? 

Samples can be submitted, in person, Monday through Friday from 8:00 am to 5:00 pm.
  • Oregon Department of Agriculture, Room 247
    635 Capitol Street NE, Salem, OR 97301
​Samples—not including cannabis—can also be mailed, with payment, to the Plant Health Lab. For all samples, payment is due at the time of submission. 

Credit card payment form

Credit card payment form

General diagnostic request form

General diagnostic request form

How much does a diagnosis cost and what does it include?

We charge $70 per sample for disease diagnosis. This includes a consultation with Plant Health Program staff and an overall evaluation, including a microscopic exam and culturing and visual identification of potential pathogens. Additional tests may be included at the submitter’s request to confirm diagnoses, and will be billed accordingly. 



Robin Ludy
Plant Health Program Specialist
Plant Health
Phone: 503-986-4658
Maria Marquez
Plant Health Certification Specialist
Plant Health
Phone: 503-986-4593
Elizabeth Savory
Program Manager
Plant Health
Phone: 503-986-4570