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

The Wonder of Water Bears, and Soon, a Sculpture at the Bohart

An artist's conception of a tardigrade sculpture in front of the Bohart Museum of Entomology.

What a wonderful idea! The Bohart Museum of Entomology at UC Davis boasts one of the world's largest tardigrade (water bear) collections, and what Lynn Kimsey wants to do, will certainly add to that point. Kimsey, director of the Bohart Museum and UC...

Posted on Tuesday, August 20, 2019 at 9:00 AM
Focus Area Tags: Economic Development,Environment,Family,Innovation

UC Davis Team: Mosquito Odorant Receptors Are Sensitive to Floral Compunds

Aedes aegypti, the yellow fever mosquito (CDC Photo)

It's well known that female mosquitoes possess a highly developed sense of smell. They manage to find us, don't they? Even when we're doing our best to try to avoid them! It's not so well-known that mosquitoes, both male and female, frequent plants to...

Posted on Monday, August 19, 2019 at 5:00 PM
Focus Area Tags: Economic Development,Environment,Health,Innovation

Youths Experience the Joy of Insects

Future entomologists? A group of students in a Bay Area three-week insect class, taught by SaveNature.Org, poses for a photo.

Do you remember when insects first fascinated you or when you developed a love of insects? Odds are that the children who attend the SaveNature.Org insect-themed sessions in Berkeley will. The husband-wife team of Norman Gershenz and Leslie-Saul...

Posted on Friday, August 16, 2019 at 2:26 PM
Focus Area Tags: Economic Development,Environment,Innovation,Natural Resources,Yard & Garden

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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


UC Blogs

UCCE Integrated Pest Management advisor Jhalendra Rijal addresses farmers, pest control advisers and UC Master Gardener volunteers in a Turlock almond orchard. (Photo: Michael Rosenblum, UCCE Stanislaus County) UCCE advisor addresses severe brown marmorated stink bug damage in Turlock orchard
Last May, a Turlock almond grower noticed nearly all the nuts on a row of trees in his orchard had fallen to the ground. “It looked like we shook this row,” he said. “I was scared. I thought the whole orchard was going to...

A new Humboldt County PBA participant enjoys his first prescribed burn in June 2019. (Photo: Lenya Quinn-Davidson) California’s first Prescribed Burn Association shows why we need more in the state
California's 2018 wildfire season was the deadliest and most destructive the state has ever seen. Even before the flames were extinguished, politicians, researchers, foresters, firefighters, insurance and utility company representatives, homeowners and...

The event's tagline is 'Regions Rise Together,' suggesting that local economies can rise along with the state's more populated areas. The 2019 California Economic Summit registration opens
Gov. Gavin Newsom is slated to be the headline speaker Registration has opened for the 2019 California Economic Summit, to be held in Fresno Nov. 7-8. The summit, produced by California Forward (CA Fwd), marks the eighth annual gathering of...

Father and son enjoy a petting zoo on a farm offering agritourism experiences. California Agritourism website - a new resource for the agritourism community
Californians and California tourists love to get out of town to enjoy rural beauty and experience a taste of rural life. This often includes visiting California's many farms and ranches that offer farm tours, farm stays, workshops, festivals, dinners,...

The Camp Fire in Butte County on Nov. 8, 2018. (Photo: NASA) Catastrophic wildfires and climate change lead to growing acceptance of ‘pyrosilviculture’
For millennia, fires periodically burned through California forests, thinning trees, reducing shrubbery and clearing out downed branches and debris. Without periodic fire, the forests became more dense, with spaces between large trees filling in with a...

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