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

How This Tiny Warrior Crashed the Hammock Lab Water Balloon Battle

Jasmine Morisseau, 10, holds a male praying mantis, a Stagmomantis limbata, the tiniest warrior at the Bruce Hammock Lab Water Balloon Battle. (Photo by Kathy Keatley Garvey)

He wasn't invited, but he crashed the party anyway. A few minutes before the 16th annual Bruce Hammock Lab Water Balloon Battle began on the Briggs Hall lawn at the  University of California, Davis, water warrior Jasmine Morriseau, 10, noticed...

Posted on Monday, July 15, 2019 at 3:07 PM
Focus Area Tags: Economic Development,Environment,Family,Innovation

Hear That Buzz? Beginning Beekeeping Courses at UC Davis!

A honey bee frame. Find the queen bee! (Photo by Kathy Keatley Garvey)

Hear that buzz? If you're thinking about becoming a beekeeper but don't know how and where to begin, the University of California, Davis, is offering beginning beekeeping classes in early August. The California Master Beekeeper Program (CAMBP), directed...

Posted on Friday, July 12, 2019 at 5:00 PM
Focus Area Tags: Agriculture,Economic Development,Environment,Health,Innovation,Natural Resources,Pest Management,Yard & Garden

Western Tiger Swallowtails: Not All Are 'Picture Perfect'

A Western tiger swallowtail nectaring on a butterfly bush. Note that it is missing part of its tail. (Photo by Kathy Keatley Garvey)

It was "hit and miss." The predators hit, and they missed. Oh sure, they took a chunk out of these Western tiger swallowtails, but as they say, "a miss is as good as a mile." The predators? Could have been a hungry bird, praying mantis, or a...

Posted on Thursday, July 11, 2019 at 7:40 PM
Focus Area Tags: Environment,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

Cannabis grows in Siskiyou County as seen from Google Earth. Research has shown that illegal cannabis production causes environmental damage. Cannabis growers asked to comment on permit process
California has legalized marijuana, but commercial cannabis growers have been slow to obtain the required state and local permits. To find out what deters them from complying with new laws, University of California scientists are asking cannabis...

Master Gardener looking through a hand lens to identify a pest problem on plant leaves. (Photo: Marcy Sousa, UCCE San Joaquin) UC IPM is celebrating 40 years
The University of California Statewide Integrated Pest Management Program (UC IPM) is celebrating its 40th anniversary. Established July 1, 1979, with funding from the California Legislature, UC IPM built upon a growing movement to reduce dependence on...

The yellow-faced bumble bee (shown on foxglove), native to the west coast of North America, is an important pollinator. Photo by Kathy Keatley Garvey We depend on pollinators
Happy Pollinator Week! For 2019, it's June 17-23. Most people think of bees when they think pollination, but don't stop there. “Think the "b" alliteration: bees, birds, butterflies, bats and beetles. But don't forget the flies, ants, mosquitoes...

Hummingbirds, along with other birds, bats and insects, are pollinators. California Naturalists' efforts benefit pollinators
'Attention is the beginning of devotion' --Mary Oliver This quote resonates this month, amidst a variety of environmental holidays and celebrations including World Environment Day, World Ocean Day, California Invasive Species Action Week, and finally...

In dairies with milking robots, cows voluntarily walk into a sophisticated, computerized box when they are ready for milking. UC helps California dairy farmers experiment with milking robots
Early in the 20th century, dairy operators traded their milking stools for machines to produce enough dairy products to meet growing consumer demand. The technological developments were critical to the formation of California's enormous dairy industry,...

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