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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

We're Thankful We're Not a Bee

On Thanksgiving, we're grateful we're not a bee, this bee. (Photo by Kathy Keatley Garvey)

Today is Thanksgiving. As we give thanks and reflect on a day set aside to be grateful, we realize that not all is great in the world of haves and have-nots, the generous and the greedy, and troublemakers and peacemakers. Miscommunications turn into...

Posted on Thursday, November 27, 2014 at 8:05 AM
Tags: honey bee (147), praying mantis (43), Thanksgiving (4)

Winning T-Shirt Design Spotlights the Honey Bee

Graduate student Danny Klittich with his prize-winning design. (Photo by Kathy Keatley Garvey)

Apiculturists and beekeepers will love this T-shirt. So will anyone else who has an avid interest in honey bees, or even a passing interest. It's all the buzz. Graduate student Danny Klittich won the UC Davis Entomology Graduate Student Association's...

Posted on Wednesday, November 26, 2014 at 4:55 PM

Drone Acrobatics

A drone fly, aka hover fly and syrphid fly, engaging in a little acrobatics  over an Iceland poppy. (Photo by Kathy Keatley Garvey)

The drone fly, aka European hover fly, aka syrphid fly, doesn't get as much press as the other drone, the unmanned aircraft. But the drone fly (Eristalis tenax), about the size of a honey bee and often mistaken for a honey bee, makes for great in-flight...

Posted on Tuesday, November 25, 2014 at 10:09 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

“No matter what sector you’re in, you’re in dire straits,” meteorologist Brad Rippey told the crowd. “California is really ground zero at this point, really sticking out like a sore thumb.” Drought talk draws ranchers, researchers and climatologists
Posted 11/26/2014 -   California's severe drought is entering a fourth year. With that, scientists met with ranchers to give background and gain feedback on a key climate indicator: the U.S. Drought Monitor. The November 7 workshop held at the University of...

Asian citrus psyllid is established in some urban Tulare County communities. Continued vigilance needed in the fight against Asian citrus psyllid
Posted 11/25/2014 - Two Asian citrus pysllids (ACP) were found in a trap near Exeter in November, just 10 miles away from the UC Lindcove Research and Extension Center. That brings to 29 the number of locations in the central San Joaquin Valley, from Bakersfield to Dinuba,...

Studies suggest biofuel can be grown on 'marginal land,' but no standard definition of 'marginal land' exists. The food vs. fuel debate: Growing biofuel in the U.S.
Posted 11/21/2014 - In order to slow global climate change and achieve greater energy independence, Americans are showing an increasing interest in switching over to clean, renewable fuels made from home-grown crops. In fact, Congress has mandated that at least 16 billion...

Argentine ants tending brown soft scale on a citrus twig. Chlorpyrifos is sometimes necessary to control ants in citrus. UC scientists help clarify use of insecticide
Posted 11/17/2014 - The insecticide chlorpyrifos is a critically important tool for California producers of alfalfa, almonds, citrus and cotton, according to a comprehensive report coordinated by the UC Statewide Integrated Pest Management Program. As part of an action...

Nutrient management in almond orchards will be discussed in November. Drought-focused soil nutrient management series offered for farmers online
Posted 11/7/2014 - Beginning in November, a free, drought-focused soil nutrient management series for farmers will be hosted online by the University of California Sustainable Agriculture Research & Education Program (UC SAREP), FarmsReach and Sustainable...

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