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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

It's Mine; Not Yours!

A male longhorned bee, Melissodes agilis (as identified by Robbin Thorp, distinguished emeritus professor, UC Davis Department of Entomology and Nematology) targets a male monarch on a Mexican sunflower. (Photo by Kathy Keatley Garvey)

So here's this hungry male monarch butterfly sipping nectar from a Mexican sunflower (Tithonia rotundifolia "Torch"). He's sipping, sipping, sipping. He's minding his own business. He's tending to his own needs. It's a good day in the pollinator...

Posted on Tuesday, June 28, 2016 at 6:01 PM

Pitch It, Plant It, Grow It

Squash bee, Peponapis pruinosa, pollinating a squash blossom. (Photo by Kathy Keatley Garvey)

What a great idea! The Horticulture Innovation Lab Demonstration Center on the UC Davis campus is spearheading a "Pitch & Plant Gardening Contest." They're looking for folks to (1) pitch an idea for a raised bed and (2) plant it and nurture it from...

Posted on Monday, June 27, 2016 at 5:51 PM

A Butterfly Ballet at a Special Place

The Western tiger swallowtail (Papilio rutulus)sips nectar from a butterfly bush in the Storer Garden, UC Davis Arboretum. (Photo by Kathy Keatley Garvey)

Ruth Charlotte Risdon Storer (1888-1986) would have been proud. The garden that bears her name in the UC Davis Arboretum is Nature at its Best, especially this time of year. It's better known as the Storer Garden, but a plaque spells out the entire...

Posted on Friday, June 24, 2016 at 6:18 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

Weed Day Root out weed problems with upcoming courses at UC Davis
Posted 6/22/2016 - Weeds are a pervasive and expensive problem in California. They can choke waterways, crowd out native species on rangeland, and rob farmers of crop yields. According to the California Invasive Plant Council, the annual cost of invasive plant work in...

Google Earth Image of a cannabis grow site. The resolution of Google Earth images allowed the researchers to detect marijuana plants that were previously missed with other remote sensing techniques. Insight into the environmental impacts of cannabis agriculture
Posted 6/21/2016 - As policy liberalization rapidly transforms the multi-billion-dollar cannabis agriculture industry in the United States, the need for regulation and assessment of environmental impacts becomes increasingly apparent.  A recent study led by UC...

ANT I-HY-IHUM-AD.005 Top 10 pests in gardens and landscapes and how to control them
Posted 6/10/2016 - Download the free booklet at the bottom of the page! 1. Ants Most people deal with ants around their home at some point. Because most ants live outdoors, focus efforts on keeping ants from entering buildings by caulking entryways. Follow good...

A researcher speaks at the 2015 Russell Field Day. (Photo: Agricultural Sustainability Institute) Russell Ranch field day at UC Davis is June 8
Posted 6/1/2016 - The Russell Ranch Sustainable Agriculture Facility, located near the UC Davis campus, will be holding its annual field day June 8 on the theme of "Farm Water Management in Times of Scarcity." Members of the public are encouraged to...

Ewes waiting for shearing at the UC Hopland Research and Extension Center Sheep Shearing School. (Photo: Evett Kilmartin) UC sheep shearing school prepares students for gainful employment
Posted 5/31/2016 - Sheep shearing is like a dance. It requires strength, flexibility, a tender touch and the right moves. Once mastered, the skill can open the door to gratifying and high-paying seasonal work. “I tell my sheep shearing students, ‘You'll never...

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