Agricultural Commissioner
Protect and perpetuate Agriculture, the #1 industry in Butte County, by ensuring a safe and healthy agriculture product. Promote and provide confidence of buyers and sellers by ensuring fairness in local, national and international trade. Protect and promote the well being of all our customers and our community through the fair, equitable application of agricultural and weights and measures standards, emphasizing education and cooperation, including the use of technology to enhance customer service.
Pest and Weed Management

Pest Management

The County Agricultural Commissioner is charged with the responsibility of managing nuisance pests of agriculture and of human health. A cooperative agreement by the County and the USDA provides for one Animal Damage Control Specialist for non-domestic pest management in Butte County. Among the many vertebrate pests controlled the most common are skunks, opossums, raccoons and beavers complaints, but many coyotes, bear and mountain lion complaints are responded to each year by the ADC Specialist.

The Agricultural Commissioner’s department also works with CDFA and USDA to develop the use of effective biological controls for use on troublesome pests of agriculture. Seven (7) different biological control organisms have been released throughout the county to help in the control of such bothersome pests such as: Puncture vine, Yellow Starthistle, Ash Whitefly, Purple Loosestrife, Klamath Weed and Italian Thistle.

Weed Management

Weed species under eradication include Spotted Knapweed, Dyer’s Woad, Skeleton Weed, and Japanese Dodder and are all very serious weed pests if left uncontrolled. Biological, chemical and mechanical methods are utilized to eliminate the most serious of these weed pests. Several other weed species are under constant surveillance to keep them under control and prevent their spreading.

Pest Detection

Butte County is involved with a proactive program to primarily detect insect pests before they become established. Traps are monitored throughout the entire county for the presence of any exotic pests of agriculture, such as Mediterranean Fruitfly, Oriental Fruitfly, Melon Fruitfly, Gypsy Moth, Brown Apple Moth, Japanese Beetle, Khapra Beetle, etc. These insect pests have an enormous host range and are difficult and costly to eradicate once they become established. Through early detection this program is protecting more than agriculture. The environment is protected by limiting the need for more pesticide applications. The quality of produce is higher when exotic pests are detected early and prevented from becoming established as common pests. Consumers are protected from rising food costs as production expenses are less.

Pest Exclusion

The Pest exclusion program provides protection to the county by regulatory control through the use of quarantines to prevent the introduction of pests, which are not known to exist or are of very limited distribution within the county. Last year over 9,800 inspections were conducted at various locations in the county checking incoming plant material for cleanliness. Many harvested crops are exported to foreign countries. Phytosanitary certificates are issued declaring the commodity shipments meet the pest-free requirements of these other countries. Seed fields are inspected during the growing season to maintain a high standard of cleanliness for export.

Winged Water Primrose

Winged Water Primrose (Ludwigia decurrens) is a non-native weed that was first identified in Butte County rice fields in late 2011. In early 2016, the California Department of Food and Agriculture Division of Plant Health reclassified WWP from a "Q" (uncertain status) rated pest to an "A" (detrimental to agriculture) rated weed pest and a "P" (prohibited) rated seed pest. These ratings have the potential to impact certified rice fields and the movement of seed as well as the export of rice to other countries.

Given the seriousness and potential economic and/or environmental detriment WWP poses, the Butte County Agricultural Commissioner's Office alongside Butte County Cooperative Agricultural Extension, California Cooperative Rice Research Foundation, Butte County Rice Growers Association, and many other local landowners, have joined forces to help manage and control the current distribution of WWP and ultimately eradicate the pest in the near future.

Below are several related links and/or resources:

Best Management Practices for the control of Winged Water Primrose
Winged Water Primrose Characteristics
Winged Water Primrose Detection Summary 2011 vs 2014
Winged Water Primrose Detection Map 2011 vs 2014
Winged Water Primrose Detection Map 2021

Butte County Cooperative Agricultural Extension
Butte County Rive Growers Association (BUCRA)
California Cooperative Rice Research Foundation
CDFA Weed Ratings
CDFA Pest Rating Proposal: Ludwigia decurrens
California Crop Improvement Association (CCIA)


Main Office
Phone: 530.552.4100
Fax: 530.538.7594

Chico District Office
Phone: 530.552.4085
Fax: 530.879.3393

Gridley District Office
Phone: 530.552.4090
Fax: 530.846.5271

View full list of contacts.


Main Office:
316 Nelson Avenue
Oroville, CA 95965
Office Hours:
Monday to Friday

District Offices:
196 Memorial Way
Chico, CA 95926
Monday to Friday
10:00am - 12:00pm

239 Sycamore Street
Gridley, CA 95948
Monday to Friday
8:00am - 10:00am
2:00pm - 4:00pm

Excludes Holidays

View full list of locations.

Agricultural Resources
CDFA's Enforcement Branch
Cal Ag Permits - Contact our office for login information.
Napa County Ag Commissioner - Instructional videos and handouts are available through Napa County's website.
Agricultural Commissioner

316 Nelson Avenue
Oroville, CA 95965

Louie Mendoza
Agricultural Commissioner

Butte County Extension (Farm Advisor)
Visit the Farm Advisor website for information about continuing education options.