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

From Out of the Blue Pops the Anthophora

First of four images: A digger bee, Anthophora urbana, heads for a Ageratum houstonianum 'Blue Horizon' at the Sunset Gardens, Sonoma Cornerstone. (Photo by Kathy Keatley Garvey)

From out the blue. And sometimes it's too good to be true. We were visiting the Sunset Gardens at the Sonoma (Calif.) Cornerstone on Sunday--marveling at the brilliant blue floss flowers, Ageratum houstonianum 'Blue Horizon'--when a bee with the...

Posted on Monday, July 30, 2018 at 5:00 PM

The Beauty of a Western Tiger Swallowtail


One of the joys of planting a pollinator garden is watching majestic butterflies flutter in and sip a little nectar. Today a Western tiger swallowtail (Papilio rutulus) took a liking to a butterfly bush (Buddleia davidii) in our Vacaville garden. The...

Posted on Friday, July 27, 2018 at 5:18 PM
Focus Area Tags: Environment Yard & Garden

Remembering the Legendary Entomologist and Toxicologist Dr. John Casida

Distinguished professor John Casida (center) with his former graduate students Sarjeet Gill (left), a distinguished professor at UC Riverside, and Bruce Hammock, a distinguished professor at UC Davis. This image was taken in 2016 at UC Berkeley.

Graduate students and postdoctoral students that the legendary John Casida trained remember him with great fondness, respect and appreciation. He made a difference: a huge difference. Dr. Casida, 88, a world-renowned entomologist and toxicologist at UC...

Posted on Thursday, July 26, 2018 at 5:37 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

Part of the strawberry field at Manzanita Berry Farms near Santa Maria where UCCE advisor Surandra Dara conducts trials on biologicals and other potential remedies for soil borne diseases, weeds and insects. Probiotics for plants: A new frontier for boosting crop production
Posted 5/11/2018 - The strawberry industry ended a long good-bye to methyl bromide in 2016. The fumigant had been used for decades to kill a wide range of soil-borne pathogens, weed seeds and insects, permitting the California strawberry industry to flourish. Scientists...

Foxtails are not native in Central California. San Juan Bautista ‘plant nerd’ connects with UC Cooperative Extension
Posted 5/2/2018 - When San Juan Bautista resident Michael Cent was looking for ways to rehabilitate a large backyard pasture infested with invasive foxtail weeds, he called Devii Rao, the UC Cooperative Extension range and natural resources advisor in San Benito...

Sorghum growing in research plots at the UC Kearney Agricultural Research and Extension Center. (Photo: Peggy Lemaux) Microbes associated with plant roots could be a key to helping plants survive drought
Posted 4/25/2018 - As sorghum plants cope with drought conditions, the plants' roots and adjoining microbial communities are communicating in a chemical language that appears to improve the plants' chances under water stress. “It's amazing,” said Peggy Lemaux,...

Director of the California Department of Pesticide Regulation, Brian Leahy, listens as an IPM Summit participant shares ideas. Turning integrated pest management ideas into action
Posted 4/23/2018 - Pests have always been a bane of human existence. Modern society has developed effective pest management, “but there is no kind and gentle way to kill things,” said Brian Leahy, the director of the California Department of Pesticide...

Insectary plants Home is where the habitat is: This Earth Day, consider installing insectary plants
Posted 4/19/2018 - Help the environment on Earth Day, which falls on Sunday, April 22, this year, by growing insectary plants. These plants attract natural enemies such as lady beetles, lacewings, and parasitic wasps. Natural enemies provide biological pest control...

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