Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

UC Cooperative Extension

ACP (Asian citrus psyllid) found in San Joaquin county

The ACP (Asian citrus psyllid) was found in Lodi and Manteca.  Click here to find out how you can help prevent the spread of this unwanted pest and what to do if you think you have it.

Who We Are

Across California, the University of California’s 64 Cooperative Extension offices are local problem-solving centers. We are the bridge between local issues and the power of UC research. Our county-based staff is part of the community – we live and work in the areas we serve.

More than 300 campus-based specialists and county-based farm, home and youth advisors work as teams to bring practical, unbiased, science-based answers to problems across California.

As part of the agricultural community, we help farmers develop more-efficient growing methods, solve pest management problems and develop crops and irrigation methods that use less water.

As stewards of the land, we help develop smart water-use strategies, develop wildfire education and help preserve natural areas and farmland.

As advocates for healthy communities, we promote healthy diets and exercise for better health, help Californians learn to choose the most nutritious foods and help shape the citizens of tomorrow through the 4-H Youth Development Program.

And thousands of volunteers extend the reach of our work through the Master Gardener Program and the California 4-H Youth Development Program.

We work in full partnership with federal, state, county and private resources.

We are stewards, problem-solvers, catalysts, collaborators and educators.

We are UC Cooperative Extension.

UC Blogs

Geoffrey Attardo's Landmark Research on Genomics of Tsetse Flies

Eye-to-eye with a gravid (pregnant) tsetse fly, Glossina morsitans morsitans. (Photo by Kathy Keatley Garvey)

You probably don't think much about the blood-sucking tsetse fly--unless you're living in Africa or are planning to travel there. But if you're UC Davis entomologist-geneticist Geoffrey Attardo, you do. He led landmark research published Sept. 2 in the...

Posted on Friday, September 13, 2019 at 4:44 PM
Focus Area Tags: Economic Development,Environment,Innovation,Natural Resources,Pest Management

Celebrating the Life of Robbin Thorp, Global Authority on Bees

The UC Davis Department of Entomology, Feb. 3, 1970. In front (from left) are Dick Bushing, Frank Summers, Bob Schuster, Al Grigarick, Bob Washino, Harry Lange and Harry Laidlaw. In back (from left) are Charles Judson. Robbin Thorp, Vern Burton, Elmer Carlson, Oscar Bacon, Frank Strong, Don McLean, Ward Stanger and Ed Loomis. Among faculty not pictured: Stanley F. Bailey, R. M. Bohart, Warren R. Cothran, Norman Gary, G. A. H. McClelland, Howard McKenzie and Gene Stafford.

A life well-lived. Robbin Thorp, distinguished emeritus professor of entomology at the University of California, Davis, was a global authority on bees and he generously shared his expertise with others. "Robbin had a long, well-respected career in...

Posted on Thursday, September 12, 2019 at 4:02 PM
Focus Area Tags: Agriculture,Environment,Innovation,Natural Resources,Pest Management,Yard & Garden

Who's Speaking at UC Davis Department of Entomology and Nematology Seminars

A yellow-faced bumble bee, Bombus vosnesenskii, nectaring on Cleveland sage. One of the UC Davis Department of Entomology and Nematology seminars during the fall quarter will be on

From honey bees to bumble bees to nematodes to mosquitoes to walnut twig beetles... Nine speakers are booked for the fall quarter seminars sponsored by the UC Davis Department of Entomology and Nematology. The seminars begin Wednesday, Sept. 25 and...

Posted on Wednesday, September 11, 2019 at 4:59 PM
Focus Area Tags: Agriculture,Economic Development,Environment,Innovation,Natural Resources,Pest Management,Yard & Garden

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Brent A Holtz Ph.D.


San Joaquin County Cooperative Extension
Robert J. Cabral Ag Center

2101 E. Earhart Avenue, Ste 200, Stockton, CA 95206
Phone: (209) 953-6100
Fax: (209) 953-6128
Click here for a map

Ag Center May 2008


Event Name

UC Blogs

A blue oak stands in a vineyard. The bat echolocation microphone and yellow sticky card (to sample insects) at the top of the telescoping pole are attached to a vine post at the edge of the tree canopy. Oaks in vineyards a ‘win-win’ for bats and growers
Californians love their oak trees. During vineyard development, Central Coast grape growers often feel compelled to leave an old iconic oak standing, even if it ends up right in the middle of their vineyard. While driving through the Central...

UCCE Integrated Pest Management advisor Jhalendra Rijal addresses farmers, pest control advisers and UC Master Gardener volunteers in a Turlock almond orchard. (Photo: Michael Rosenblum, UCCE Stanislaus County) UCCE advisor addresses severe brown marmorated stink bug damage in Turlock orchard
Last May, a Turlock almond grower noticed nearly all the nuts on a row of trees in his orchard had fallen to the ground. “It looked like we shook this row,” he said. “I was scared. I thought the whole orchard was going to...

A new Humboldt County PBA participant enjoys his first prescribed burn in June 2019. (Photo: Lenya Quinn-Davidson) California’s first Prescribed Burn Association shows why we need more in the state
California's 2018 wildfire season was the deadliest and most destructive the state has ever seen. Even before the flames were extinguished, politicians, researchers, foresters, firefighters, insurance and utility company representatives, homeowners and...

The event's tagline is 'Regions Rise Together,' suggesting that local economies can rise along with the state's more populated areas. The 2019 California Economic Summit registration opens
Gov. Gavin Newsom is slated to be the headline speaker Registration has opened for the 2019 California Economic Summit, to be held in Fresno Nov. 7-8. The summit, produced by California Forward (CA Fwd), marks the eighth annual gathering of...

Father and son enjoy a petting zoo on a farm offering agritourism experiences. California Agritourism website - a new resource for the agritourism community
Californians and California tourists love to get out of town to enjoy rural beauty and experience a taste of rural life. This often includes visiting California's many farms and ranches that offer farm tours, farm stays, workshops, festivals, dinners,...

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