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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

Meet Your Entomologists Who Study Everything from Soapberry Bugs to Monarchs

The focus is on soapberry bugs in this collage by evolutionary ecologist Scott Carroll. Doctoral candidate Meredith Cenzer will speak on her research on Oct. 5.

A good place to meet entomologists and learn about what they're researching is at seminars. The UC Davis Department of Entomology and Nematology has announced the list of speakers for the fall seminars. Agricultural entomologist and seminar coordinator...

Posted on Friday, September 23, 2016 at 4:56 PM

Fluttering Along on a Butterfly Tour

Entomologist Joel Hernandez discusses butterflies and moths. In the background are some of his specimens. (Photo by Kathy Keatley Garvey)

They explored the amazing diversity of butterflies. Nearly 90 butterfly enthusiasts--from senior citizens to pre-schoolers--met up with entomologist Joel Hernandez last Sunday for his second annual talk and tour on "Butterflies Up Close," sponsored by...

Posted on Thursday, September 22, 2016 at 3:16 PM

There's a Genetic Component to the Host Choice of This Malaria Mosquito

Villagers and cattle along the road near Pimperena in southern Mali. UC Davis researchers have announced that mosquito preference for human-versus-animal biting has a genetic component. (Photo by Yoosook Lee, UC Davis)

A mosquito that feeds on both humans and cattle and is the primary vector of malaria in east Africa is making headlines. And well it should. Research led by UC Davis medical entomologists and published in the Sept. 15 edition of PLOS Genetics,...

Posted on Tuesday, September 20, 2016 at 6:08 PM

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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

An example of pollinator-friendly plants at the Haagen-Dazs Honey Bee Haven Garden located at the UC Davis campus. (Photo : Evett Kilmartin ©UC Regents) Twelve rules of thumb for creating a bee-friendly home landscape this fall
Posted 9/16/2016 - California's agriculture, plants and wildflowers depend on bees (and other pollinators) for pollination. Tiny, buzzing bees are not only fun to watch zoom around the garden, but they are crucial to our food supply and ecosystem. “Fall, with its...

Author Rachael Freeman Long, UC Agriculture and Natural Resources Cooperative Extension advisor. UCCE advisor publishes third exciting children’s book
Posted 9/15/2016 - Nursing back to health a calf mauled by wolves in River of No Return, 11-year-old Jack learned essential skills that would serve him well as the third and final book of the Black Rock Desert Trilogy children's series unfolds. The novel opens with a touch...

In 2015, fishing tournaments were held at Clear Lake on 121 days. Communities reel in revenue from sport fishing
Posted 9/13/2016 - Angling is a multi-million dollar recreational affair in California that local businesses can capitalize on, says UC Cooperative Extension advisor.   In August, the Clayton Fire burned nearly 4,000 acres and 198 homes and businesses in Lake...

One tour will visit the City of Arcata Community Forest. Community members use the actively managed forest on a daily basis. Community invited to explore redwood issues in Eureka Sept 13-15
Posted 9/3/2016 - Foresters, landowners, managers, community and conservation groups, land trustees, scientists and policymakers will meet Sept. 13 to 15 in Eureka for the 2016 Coast Redwood Science Symposium. The symposium, which first convened in Humboldt County in...

Bumblebee. How wildflower plantings on farms benefit bees and crop pollination
Posted 9/2/2016 - Bloom where you're planted. That old adage takes on more meaning when you plant wildflower strips on your farm. Wildflowers add resilience to our farming systems by providing bees with habitat and food - pollen and nectar. And they're not just for honey...

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