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

Butterfly Summit: Are Butterflies Heralds of Apocalypse?

A male monarch seeking nectar in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

"The butterfly counts not months but moments, and has time enough," wrote the late poet Rabindranath Targoe (1861-1941) of Bengali, who won the Nobel Prize in Literature in 1913. There may not be "time enough" for some species that are rapidly...

Posted on Friday, April 19, 2019 at 3:33 PM
Focus Area Tags: Agriculture,Environment,Family,Food,Health,Innovation,Natural Resources

A Bee-Line to the Bohart Museum: T-Shirts and Calendars

Bohart associate Fran Keller, an assistant professor at Folsom Lake College and a UC Davis alumnus (she received her doctorate in entomology studying with Lynn Kimsey) holds some of the new dragonfly t-shirts available at the Bohart Museum. (Photo by Kathy Keatley Garvey)

Folks are making a bee-line to the Bohart Museum of Entomology, University of California, Davis, for its spring sale. All proceeds support the insect museum in its educational and outreach activities. The gift shop is offering a selection of...

Posted on Thursday, April 18, 2019 at 5:08 PM
Focus Area Tags: Family,Innovation

'Adventure Awaited' at Virtual Reality Demonstration

UC Davis medical entomologist Geoffrey Attardo shows Sebastian and Kamila Ehrlich examples of  what insects they might want to see in virtual reality. In back is their mother, Carollina Ehrlich. (Photo by Kathy Keatley Garvey)

"Adventure Awaits!" the theme proclaimed. And that it did Saturday at the 105th annual UC Davis Picnic Day--especially at the second annual "Virtual Reality Bugs" display at Briggs Hall, the administrative home of the UC Davis Department of Entomology...

Posted on Wednesday, April 17, 2019 at 2:03 PM
Focus Area Tags: Agriculture,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 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...

Insectary plants Home is where the habitat is: This Earth Day, consider installing insectary plants
Help the environment on Earth Day, which falls on April 22, by growing insectary plants. These plants attract natural enemies such as lady beetles, lacewings, and parasitic wasps. Natural enemies provide biological pest control and can reduce the...

All California Naturalists use the iNaturalist app. Documenting urban nature in the City Nature Challenge April 26-29
Have you ever been on a walk and observed an interesting plant you couldn't identify? Encountered an unusual insect trapped in your home? Have you wondered why you used to see certain species in nature and you don't now? Or have you thought it might be...

December 1968 Earth rise. Earth Day history can inspire us all
My father was ahead of his time. Years before Americans were asked to, Jim Hayden ensured that our family conserved energy by keeping the thermostat low, turning off lights and taking "military" showers to reduce water use. My father also observed the...

Ghost pines, live oaks, black oaks and madrones, among other trees, make their stand interspersed with annual and perennial grasses at the headwaters of a California watershed. (Photo: David Lewis) Headwaters
I have the privilege of engaging California's communities with the aspiration of safeguarding the sustenance and well-being that its oak-woodland watersheds and the people that are a part of them provide. This millennia-long integrated relationship of...

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