UC Cooperative Extension
ACP (Asian citrus psyllid) found in San Joaquin county
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.
It's the place to "bee" on Sunday, May 7 at the University of California, Davis. You'll meet scientists, environmentalists and beekeepers; you can brush up on bee friendly plants; and you can learn why honey is "as good as gold." Yes, excitement is...
The venomous black widow spider (Latrodectus hesperus) is usually found in and around wood piles, beneath stones and rubble, and in cluttered areas of basements, sheds and garages. It can strike fear in the hearts of non-biologists. Sometimes it's found...
Can dead bees sting? Yes, they can. Here's the scenario: Our pollinator garden is buzzing with the sights and sounds of honey bees. Ah, spring! A few feet away, California scrub jays are nesting in the cherry laurel hedges. They leave periodically...
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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
Free forestry workshops to help teachers meet new science standards
Posted 4/18/2017 - California's K-12 teachers are being challenged by the Next Generation Science Standards to find new and more engaging ways to teach science. Adopted by California in 2013, the science-education standards guide how science, technology, engineering and...
New era of western wildfire demands new ways of protecting people, ecosystems
Posted 4/17/2017 - Current wildfire policy can't adequately protect people, homes and ecosystems from the longer, hotter fire seasons climate change is causing, according to a new paper led by the University of Colorado Boulder. Efforts to extinguish every blaze and...
Celebrating the 100th California Naturalist class
Posted 4/17/2017 - How did we get here and where shall we venture together? This spring, the 100th California Naturalist class is being offered in Sonoma County – the very same county where we first piloted the curriculum. The UC Agriculture and Natural Resources...
Super blooms in the Central Valley: Why it’s not just about the color
Posted 4/12/2017 - Have you seen the blaze of super blooms popping up alongside orchards and field crops in our rich agricultural Central Valley? The corridors of poppies, tidy tips, yarrow, baby blue eyes, and redbud planted by farmers, dazzle us with color, but they...
UC helps forest owners adapt to climate change
Posted 4/5/2017 - To help California forest property owners adapt to the changing climate, UC Agriculture and Natural Resources (UC ANR) has produced a 13-page peer-reviewed paper that outlines actions owners can take to sustain their forests' value even when temperatures...