Programs of the Agricultural Commissioner

Agricultural Product Quality

Nursery Licenses

Produce Inspection



Direct Marketing & Organics

Organic Info

Mo. Co. Certified Organics

Farmers Markets


Pesticide Use & Enforcement

Restricted Material Permits

Private Applicator Certificates

Worker Safety

File a Complaint


Pest & Disease Prevention

Phytosanitary Certificates





Invasive Weeds

Weed Threats

Weed Resources


Weights & Measures

Consumer Protection

Device Registration

Public Scales

Invasive Weed Resources

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Weed Identification

Proper weed identification is key to a successful program.  Below is a list of where to have weeds identified by trained botanists:

California Department of Food and Agriculture, Plant Pest Diagnostics Branch

UC Davis Herbarium
Contact a local university, botanical garden, or herbarium near you.

Puncturevine  Tribulus terrestris

Biological Control of Weeds

Biological weed control helps reduce reliance on commercial, synthetic pesticides. Such methods use plants, microorganisms and animals in the management, control and eradication of weeds of concern. Biological control is also available for insect and disease threats to agricultural crops and livestock ~ click here for bio-control of insects and disease.

The Agricultural Commissioner collaborates with CDFA and the University of California in the introduction and release of biological control agents throughout the county. An example of local biological pest control methods for weeds includes insects to control yellow star thistle.

For more information or to request biological control agents by contacting Hannah Wallis, Agricultural Programs Biologist at 831-759-7332 or Note that these bio-control agents are typically available in June/July.