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 Bug Doctor Is In! Ask Me a Question!

Doctoral candidate Brendon Boudinot answers questions about insects in the Bug Doctor booth at Briggs Hall. (Photo by Kathy Keatley Garvey)

The doctor is in. The Bug Doctor, that is. If you attended the 105th annual UC Davis Picnic Day and headed for Briggs Hall, home of the Department of Entomology and Nematology, you encountered a booth lettered with "Bug Doctor" and a sign that read:...

Posted on Thursday, April 25, 2019 at 6:14 PM
Focus Area Tags: Agriculture,Environment,Family,Innovation,Natural Resources,Pest Management

Walter Leal Selected to Give ESA Founders' Memorial Award Lecture

Walter Leal, UC Davis distinguished professor, has been selected to deliver the ESA Founders' Memorial Award Lecture on Nov. 19 in St. Louis, Mo. (Photo by Kathy Keatley Garvey)

Breaking news and a well-deserved honor: Insect chemical ecologist Walter Leal, a distinguished professor at the University of California Davis, has just been selected to deliver the Founders' Memorial Award Lecture at the Entomological Society...

Posted on Wednesday, April 24, 2019 at 5:00 PM
Focus Area Tags: Agriculture,Economic Development,Environment,Innovation,Natural Resources,Pest Management

It Was a Scorpion Kind of Day at the Bohart Museum of Entomology

Logan Loss, 6, of Rocklin talks about scorpions to Bohart associate and scorpion scientist Wade Spencer. The kindergarten student is an avid scorpion enthusiast. Also pictured are members of the Vacaville Brownie Girl Scout Troop (from left) Jayda Navarette, Keira Yu and Kendl Macklin, front. (Photo by Kathy Keatley Garvey)

Little Logan Loss of Rocklin is only 6 but already he knows more about scorpions than many, if not most, adults do. Logan, a visitor at the Bohart Museum of Entomology's recent open house on spiders and other arachnids, wowed the crowd with his...

Posted on Tuesday, April 23, 2019 at 3:51 PM
Focus Area Tags: Environment,Family,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

Western bluebird eating a caterpillar pest. (Photo: Glenn Bartley/VIREO) Birds are beneficial too!
Across the globe, scientists have shown that birds can be farmer allies. Insectivorous birds feed on damaging insect pests in many crops including coffee, cacao, oil palm, corn, cabbage and apples. Raptors, including hawks and barn owls, feed on rodents,...

Tom Garcia, fire management officer with the Whiskeytown National Recreation Area, spoke at the UC ANR Fire Summit. (Photo: Evett Kilmartin) Education and research needed in battle against California wildfires
I'm trained in soil chemistry, what on earth could I get from a Fire Summit? If you get the right speakers together, you can learn a lot! UC ANR and the California Fire Science Consortium sponsored a Fire Summit in Redding in April for some 150...

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...

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