Plant Pest Diagnostics Laboratory


NEW! Lab Newsletter - 2023 SPRING

Regulatory Programs

The San Diego County Plant Pest Diagnostics Laboratory is an integral part of regulatory activities that protect local agriculture. The lab works directly with the California Department of Food and Agriculture, and County Apiary, Integrated Pest Management, Nursery Inspection, Pest Detection, Pierces Disease Control, Pest Exclusion and Quarantine programs, to rapidly detect, identify and respond to invasive pests.

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Suspect Invasive Species

Please help protect our local agricultural environments by alerting us to any suspect invasive species found in the county.

Pests can be reported directly to CDFA Report a Pest Hotline 1-800-491-1899

Samples can also be submitted to our drop box or front desk locations:

Agriculture, Weights & Measures North County Office, 151 E. Carmel Street, San Marcos, CA 92078

Agriculture, Weights & Measures County Operations Center, 9325 Hazard Way, Suite 100, San Diego, CA 92123

or virtually as photographs to our email ( Please send only one photograph per email due to file size limits. Include a completed  Specimen for Determination form with all sample submissions.

Commercial Agricultural Operations

The University of California Cooperative Extension (UCCE) Advisors assist industry with pest management (858-822-7711;

Plant disease diagnostics (Plant Pathology, Botany, Seed, Nematology) are offered directly through the California Department of Food and Agriculture (CDFA) Plant Pest Diagnostics Center.

PDR form | Sample Preparation and Submission | Plant Pathology Service Fee Schedule

Commercial nursery or greenhouse growers can now submit ornamental plant pathology samples at no cost to Greenhouse and Nursery Pathology UC Davis

Residential Samples

The AWM Lab typically does not handle residential garden samples; these samples are referred to the University of California Cooperative Extension (UCCE) Master Gardeners Program (858) 822-6910. Residents are encouraged to submit unfamiliar insects to iNaturalist for identification.

Biting, stinging, and indoor pests are referred to the county Vector Control Program.