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

Nematodes in Outer Space?

UC Davis doctoral student and nematologist Christopher Pagan shows nematode specimens to visitors at the UC Davis Biodiversity Museum Day. (Photo by Kathy Keatley Garvey)

Nematodes in outer space? It's true. The U.S. Department of Agriculture's (USDA) Agricultural Research Service (ARS) and Pheronym, a company in Alachua, Fla., that develops and produces nematode pheromones, have announced plans to send...

Posted on Thursday, February 21, 2019 at 4:54 PM
Focus Area Tags: Agriculture,Environment,Innovation,Natural Resources,Pest Management

'Bearing' a Close Resemblance

Entomologist/artist Charlotte Herbert Alberts wearing a red hooded sweatshirt: front view showing the Bohart logo and a tardigrade face. (Photo by Kathy Keatley Garvey)

You've heard of the California Bear Flag, the one with the grizzly bear" right?  It's lettered with "California Republic." But have you heard of the "other" bear flag that's on a hooded sweatshirt at the Bohart Museum of Entomology at the...

Posted on Wednesday, February 20, 2019 at 5:03 PM
Focus Area Tags: Environment,Innovation,Natural Resources

A Mid-Winter Gathering of Lepidopterists at Bohart Museum

Lepidopterists (from left) Paul Johnson, Jerry Powell and Bill Patterson discuss butterfly species. (Photo by Kathy Keatley Garvey)

Identification. Collaboration. Camaraderie. The scientists and butterfly/moth enthusiasts who gathered Saturday, Feb. 9 for the Northern California Lepidoptera  Society meeting in the Bohart Museum of Entomology at the University of California,...

Posted on Tuesday, February 19, 2019 at 3:58 PM
Focus Area Tags: Environment,Innovation,Natural Resources

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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 grapevine with red blotch symptoms. (Photo: Evett Kilmartin) UC researchers discover how grapevine red blotch virus diminishes winegrape value
Grapevine red blotch virus, a disease that is dramatically reducing the value of winegrapes in California's premium wine production region, is harming plants by inhibiting photosynthesis in the leaves, according to research published this month in the...

ANR is partnering with UC Merced and UC Irvine scientists to develop new tools and methods for better land management. New project to build climate resilience through improved land management
A $4.6 million grant to UC Merced and UC Irvine will help UC Agriculture and Natural Resources researchers develop new tools and methods for California land owners to better manage the state's forests, shrub lands and grasslands. California's...

UCCE cropping systems advisor Jeff Mitchell with a shovelful of healthy soil at the UC West Side Research and Extension Center. Researcher invites public to visit San Joaquin Valley soil health demonstration site in Five Points
UC Cooperative Extension cropping systems specialist Jeff Mitchell is issuing a standing invitation to the public to visit the site of an ongoing conservation agriculture research project and see for themselves the results of long-term soil-building...

A possible climate change outcome in California may be returning farmland to less-intensive uses, such as grazing. UC Cooperative Extension ramps up its climate change response
While scientific reports continue to mount confirming that global climate change is increasing temperatures, causing more frequent weather extremes and raising the sea level in California, UC Cooperative Extension is working to ensure the worst...

Tree leaves and needles are removed because they block sunlight needed for marijuana plants. Pacific Southwest Region 5 photo, via Flickr New Cannabis Research Center to explore environmental, social impacts of legalization
  Cannabis is unlike any other agricultural crop. Because of its circuitous history — once illegal to grow, and now legal but heavily regulated — cannabis has cast a unique footprint on the environment and the communities of farmers...

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