Heather B. Vallier, Ph.D

Senior Plant Pathologist, Nematologist, Virologist, & Plant Health Diagnostician
  • Crop Doctor Laboratory
  • Selecting Samples
  • Make a Payment or Purchase Services
  • Staff
  • Contact

Chain of Custody Form

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Our Services

Fungal Pathogen Analysis
Virology Analysis
Bacteriology Analysis
Nematode Extraction and Identification
Insect Identification
Soil Pathogen Analysis
Water Pathogen Analysis
Seed Pathogen Analysis
On Site Evaluation
Research and Special Projects
Expert Witness Testimony
Report Writing and Delivery (fax, phone, e-mail)
Purchase a 1 Hour Phone or Email Consultation

Contact Us

(805) 927-7707
 E-mail the Crop Doctor
Request Services or ask a Question

Learn More

  • How to Take a Sample
  • How to Purchase Services

© Heather B. Vallier, Ph.D 2026
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