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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 Fly Is a Fly Is a Fly

Drone fly, Eristalis tenax, sipping nectar from a Mexican sunflower, Tithonia. (Photo by Kathy Keatley Garvey)

A bee is a bee is a bee is a bee. 'Cept when it's a fly. Lately we've been seeing lots of images on social media (including Facebook and Twitter), news media websites, and stock photo sites of "honey bees."  But they're actually...

Posted on Monday, October 20, 2014 at 9:03 PM

Have You Seen Me? A Tagged Monarch?

Close-up of a tagged Monarch butterfly. (Photo by David James, entomologist at Washington State University, Pullman, Wash.)

The next time you see a Monarch butterfly heading your way--or settled in at an overwintering site in coastal California or in central Mexico--check to see if it's tagged. It may have flown hundreds of miles from the Pacific Northwest, and Washington...

Bee BMP: 'A' for Communication


Can you say "Bee BMP?" That's a short-cut for "Bee Best Management Practices." The Almond Board of California today unveiled its long-awaited "Honey Bee Best Management Practices for California Almonds." It's an important document because it is aimed...

Posted on Thursday, October 16, 2014 at 9:19 PM

Make a Gift Online

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 sweat bee collects pollen from a California poppy. (Photo: Rollin Coville) A guide for California wanna-bees
Posted 10/15/2014 - The 1,600 species of wild bees that buzz their way to California gardens and green spaces get hungry, and there's a lot city dwellers and suburbanites can do to create an appealing buffet for the valuable pollinators. California Bees & Blooms: A...

Pink waterlilies glowing in a garden pond. (Photo by Kathy Keatley Garvey) When your fish pond is an egret's sushi buffet
Posted 10/8/2014 - Ah, the joy of a fish pond.  Goldfish swimming lazily beneath pink waterlilies,  doves splishing and splashing, frogs jumping and croaking, dragonflies darting and ambushing, and honey bees collecting water, trip after trip, for their...

Jeff Thompson, California Trout's executive director, does a little fly fishing on the McCloud River. He played a crucial role in establishing the organization's partnership with UC Davis to ensure that research, teaching, and outreach on wild trout, salmon, and steelhead will continue for many years. Conservation organization California Trout helps establish endowed chair at UC Davis
Posted 9/30/2014 - California once teemed with millions of native salmon, trout and steelhead. The state has 31 distinct types of these iconic, majestic fish. But decades of degradation to aquatic habitat has depleted their numbers in many areas of the state. According...

Researchers, farmers, and agricultural professionals learn from one another in discussion at a recent field day. Outreach lessons for the information age
Posted 9/24/2014 - In the information age, helpful information can be amazingly hard to find. Certainly for agriculture, the landscape is rife with expertise, experience, and knowhow. But connecting to the knowledge and linking knowledge-seekers with knowledge-holders can...

Comanagement  conference participants  discuss farming and conservation efforts at a diversified organic operation. Balancing food safety and water quality not cheap or easy, but it can be done
Posted 9/19/2014 - Fresh produce growers are challenged to protect soil and water quality on their farms as well as support wildlife populations by preserving their habitat. At the same time, growers must protect their crops from contamination by pathogens that can cause...

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