Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

UC Cooperative Extension

Cleaning Up Wildfire Ash Safely

You can avoid many health hazards from wildfire ash following these tips from California Department of Public Health, found online here

or you can download and print this flier Cleaning Up Wildfire Ash Safely CDPH 7 Aug 2018


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 Enemy of the Gardener

Oleander aphids clustering on a milkweed stem. (Photo by Kathy Keatley Garvey)

Aphids, don't you just hate them? Especially those oleander aphids that suck the very lifeblood out of our milkweed plants that we're struggling to save for monarch butterflies. Just call aphids "The Enemy of the Gardener" or "The Enemy of the...

Posted on Friday, September 28, 2018 at 4:00 PM

Bee Garden Open House Draws Not Only People, But Resident Bees and Butterflies

Visitors check out the flowers at the Häagen-Dazs Honey Bee Haven. (Photo by Kathy Keatley Garvey)

It was not just people who attended the Häagen-Dazs Honey Bee Haven open house at the University of California, Davis last Saturday. So did honey bees, carpenter bees, bumble bees, metallic green sweat bees, Gulf Fritillary butterflies and cabbage...

Posted on Thursday, September 27, 2018 at 5:02 PM
Focus Area Tags: Environment Family Yard & Garden

A Crafty Time at the Bohart Museum of Entomology

This quilted wall hanging of dragonflies is the work of quiltmaker and seamstress Ann Babicky of Schofield, Wis. Entomologist Jeff Smith, who curates the butterfly and moth specimens in the Bohart, loaned it for the open house. (Photo by Kathy Keatley Garvey)

Five quilted dragonflies skimming the wall. Eager hands cradling an orchid mantis. Eyes darting toward a hornet's nest. That set the scene at the UC Davis Bohart Museum of Entomology's three-hour open house, themed "Crafty Insects."  Visitors...

Posted on Wednesday, September 26, 2018 at 2:57 PM

Make a Gift Online

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

During a field day demonstration, this drone flew autonomously back and forth over the field, then landed within two feet of the takeoff location. UCCE helps farmers see the potential in agricultural use of drones
Posted 6/29/2018 - In the late 1800s, when automobiles started replacing horses in the United States, farmers were likely pondering how the new technology could be adapted for agricultural production. Before long, tractors revolutionized the industry. A similar scenario...

The UC Cooperative Extension Compost Education Program facility at Martial Cottle Park in San Jose. Reduce food waste to combat world hunger and slow global climate change
Posted 6/13/2018 - One-third of the world's food is spoiled or tossed rather than eaten, a fact that is tragic when nearly one billion people go hungry. The injustice of food waste is worsened by the fact that food decomposing in landfills emits greenhouse gases that...

The Western tiger swallowtail, Papilio rutulis, was a frequent visitor to the Häagen-Dazs Honey Bee Haven during the early years. Note the spider lurking beneath the zinnia blossom. (Photo by Kathy Keatley Garvey) National Pollinator Week: Open house at UC Davis Bee Garden
Posted 6/12/2018 - June 18-24 is National Pollinator Week. Do you know where your pollinators are? Think bees, birds, butterflies, bats and beetles. And think flies. Especially syrphid flies, also known as "flower flies" and "hover flies." The UC Davis Department...

UCCE advisors Phoebe Gordon, left, and Luke Milliron are the hosts of the new 'Growing the Valley' podcast. UC Cooperative Extension farm advisors launch “Growing the Valley” podcast
Posted 6/6/2018 - A new UC Cooperative Extension podcast that focuses on growing orchard crops in the San Joaquin and Sacramento valleys is now available free at, Apple iTunes and Google Play Music. The hosts are Phoebe Gordon,...

A sugar volcano (sugary exudate) on avocado tree trunk. During California Invasive Species Action Week, learn about invasive species
Posted 6/4/2018 - Californians can help in the fight against invasive species by learning and participating during California Invasive Species Action Week, June 2–10. During the week, the UC Statewide Integrated Pest Management Program invites the public...

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