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

4th International Pollinator Conference Begins

Extension piculturist Elina Lastro Niño of the UC Davis Department of Entomology and Nematology chats with the International Pollinator Conference co-founder Rufus Isaacs of Michigan State University at the Thursday reception. (Photo by Kathy Keatley Garvey)

With a buzz here and a buzz there, the 4th International Pollinator Conference, hosted by the University of California, Davis, is underway. The conference, themed "Multidimensional Solutions to Current and Future Threats to Pollinator Health," opened...

Posted on Thursday, July 18, 2019 at 3:36 PM
Focus Area Tags: Agriculture,Economic Development,Environment,Health,Innovation,Natural Resources,Pest Management

International Pollinator Conference Comes to UC Davis

A longhorned bee flies over a Mexican sunflower blossom (Tithonia) in Vacaville. (Photo by Kathy Keatley Garvey)

It's all about the pollinators--whether they be bumble bees, longhorned bees, squash bees, sweat bees, honey bees or hummingbirds. Yes, hummingbirds are pollinators, too! A capacity crowd of 250 will attend the fourth  International Pollinator...

Posted on Wednesday, July 17, 2019 at 5:55 PM
Focus Area Tags: Agriculture,Economic Development,Environment,Innovation,Natural Resources,Pest Management,Yard & Garden

Male Longhorned Bees: Boys' Night Out!

Male longhorned bees, Melissodes, spending the night on a Mexican sunflower (Tithonia)in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Boys' Night Out! Have you ever seen a cluster of longhorned male bees sleeping overnight on a Mexican sunflower (Tithonia)? Every day around sunset, the longhorned bees, probably Melissodes agilis  (tribe Eucerini), call it a day and head for...

Posted on Tuesday, July 16, 2019 at 6:40 PM
Focus Area Tags: Agriculture,Environment,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


Event Name

UC Blogs

Cannabis grows in Siskiyou County as seen from Google Earth. Research has shown that illegal cannabis production causes environmental damage. Cannabis growers asked to comment on permit process
California has legalized marijuana, but commercial cannabis growers have been slow to obtain the required state and local permits. To find out what deters them from complying with new laws, University of California scientists are asking cannabis...

Master Gardener looking through a hand lens to identify a pest problem on plant leaves. (Photo: Marcy Sousa, UCCE San Joaquin) UC IPM is celebrating 40 years
The University of California Statewide Integrated Pest Management Program (UC IPM) is celebrating its 40th anniversary. Established July 1, 1979, with funding from the California Legislature, UC IPM built upon a growing movement to reduce dependence on...

The yellow-faced bumble bee (shown on foxglove), native to the west coast of North America, is an important pollinator. Photo by Kathy Keatley Garvey We depend on pollinators
Happy Pollinator Week! For 2019, it's June 17-23. Most people think of bees when they think pollination, but don't stop there. “Think the "b" alliteration: bees, birds, butterflies, bats and beetles. But don't forget the flies, ants, mosquitoes...

Hummingbirds, along with other birds, bats and insects, are pollinators. California Naturalists' efforts benefit pollinators
'Attention is the beginning of devotion' --Mary Oliver This quote resonates this month, amidst a variety of environmental holidays and celebrations including World Environment Day, World Ocean Day, California Invasive Species Action Week, and finally...

In dairies with milking robots, cows voluntarily walk into a sophisticated, computerized box when they are ready for milking. UC helps California dairy farmers experiment with milking robots
Early in the 20th century, dairy operators traded their milking stools for machines to produce enough dairy products to meet growing consumer demand. The technological developments were critical to the formation of California's enormous dairy industry,...

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