Agricultural Commissioner's Office


Agricultural Commissioner Sealer of Weights and Measures

Greg Clark 1

Agricultural Commissioner / Sealer of Weights and Measures

The Napa County Agricultural Commissioner and staff are responsible for the implementation of federal, State and local regulatory programs within Napa County. These programs are designed to protect people and the environment and to promote agriculture within the county. Napa County currently has a reputation as a premier wine-producing region, but, as history has shown, also has the climate and soils capable of producing many types of exceptional agricultural products.



Food Quality and Marketing

Direct Marketing, Farmers' Markets, Organic Registration, Standardization

Pesticide Safety Program

CalAgPermits, Continuing Education Resources, Pesticide Container Recycling, Pesticide Use Enforcement   

Pests and Diseases

European Grapevine Moth, Vine Mealybug, Glassy-winged Sharpshooter, Light Brown Apple Moth, Brown Marmarated Stink Bug

Bring in an insect for identification (learn more)

Weights and Measures

Device Registration Ordinance, Quality Control of Packaged Goods, Weighing and Measuring Devices

Wildlife Services

Introduction to the Program, Tips to Prevent Wild Animal Encounters


Other Department Information


Buy Plants Locally!

Buy plants in Napa County where they are inspected for Glassy-winged sharpshooter egg masses. Your help has kept this important vector of Pierce’s disease out of the County for over 15 years. The health of the Napa County vineyards and economy depends on this effort!

Don't Bug Out PSA
Buy Local Plants PSA


European Grapevine Moth Eradicated from California!

The European Grapevine Moth has been eradicated from California and the quarantine restrictions have been lifted!

CDFA News Release
EGVM Information

VMB Seminar 2017

2017 Vine Mealybug Seminar

In February 2017, the Ag Commissioner's Office and the Napa County Pest and Disease Control District sponsored a free informational Vine Mealybug Seminar for local grapegrowers. PDFs of the PowerPoint presentations are now available!

Ag Commissioner's Office 2016 Update
Ag Commissioner's Office 2016 Update in Spanish
VMB Challenges- Grower Perspective
VMB Challenges- Grower Perspective in Spanish
VMB Biological Control and Mating Disruption
VMB Biological Control and Mating Disruption in Spanish
VMB Chemical Control Options
VMB Chemical Control Options in Spanish