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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

A Day to Wear Red

Seeing red...a honey bee packing red pollen heads for lavender. (Photo by Kathy Keatley Garvey)

If you're around the UC Davis campus on Friday, Feb. 5, be sure to wear red. Faculty, staff and students--and everyone else interested--will take over Hutchison Field, UC Davis campus, on Friday for the third annual UC Davis Wears Red Day. It's meant...

Posted on Thursday, February 4, 2016 at 6:58 PM

Going Native

Female sweat bee, Halictus rubicundus, foraging Jan. 25 at the Benicia Capitol State Park. Note the tiny wasp, which appears to be a bethylid.(Photo by Kathy Keatley Garvey)

Honey bees aren't the only bees out foraging. We saw our first native bee of the season on Jan. 25 at the Benicia Capitol State Historic Park. Native pollinator specialist Robbin Thorp, distinguished emeritus professor of entomology at the UC Davis...

Posted on Wednesday, February 3, 2016 at 6:15 PM

The Last Survivors: Hammock-Style

Bruce and Lassie Hammock are depicted as drought-besieged farmers in

It's the look you'll never forget. Disheveled and depressed. Desolate and defeated. Weary and worn.  Is that really Bruce Hammock, the distinguished professor who holds a joint appointment in the UC Davis Department of Entomology and Nematology...

Posted on Tuesday, February 2, 2016 at 1:54 PM
Tags: Bruce Hammock (26), film (1), indie (1), Lassie Hammock (1), The Lost Survivors (1), The Well (2), Tom Hammock (3), UC Davis (72)

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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

cilantro The UC Pest Management Guidelines just got spicier!
Posted 2/4/2016 - Whether or not your favorite team is playing in Sunday's big game, the Super Bowl is often a great excuse to gather with friends and family and enjoy some tasty treats. Maybe your favorite snack involves chips with salsa or guacamole, or perhaps you...

A ewe and her lamb at the UC Hopland Research and Extension Center. (Photo: Robert Keiffer) Research can help Californians live safely with wildlife
Posted 1/15/2016 - Winter is typically lambing season on Northern California sheep ranches - a perilous time of year. Baby lambs are vulnerable prey for wildlife like coyotes, mountain lions and bears. With increasing numbers of wildlife, both rural and urban neighborhoods...

Tap Water International experts to discuss water pricing Feb. 2-3 in Sacramento
Posted 1/13/2016 - Although rain has begun falling in California after four years of drought, living with limited water is the new normal for Californians, according to University of California water experts. To manage its water for the future, California needs to look...

Student creators of the Eggmobile. (Photo: Don Preisler) Pastured poultry farm to foster innovation for small chicken farms
Posted 12/16/2015 - UC Agriculture and Natural Resources (UC ANR) provided seed money to launch a new Pastured Poultry Farm at UC Davis. The farm is home to 150 young chickens and a living laboratory where students and faculty researchers hope to develop innovative...

Using microsprinklers instead of aluminum sprinkler sets to establish strawberries offers significant water savings. Farmers can use micro-sprinklers in strawberries to cut water use
Posted 12/11/2015 - Substituting micro-sprinklers for aluminum sets when strawberries are first planted presents another opportunity for farmers to reduce their water use without sacrificing yield, according to research recently completed by Surendra Dara, UC Agriculture...

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