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.
Nematodes in outer space? It's true. The U.S. Department of Agriculture's (USDA) Agricultural Research Service (ARS) and Pheronym, a company in Alachua, Fla., that develops and produces nematode pheromones, have announced plans to send...
You've heard of the California Bear Flag, the one with the grizzly bear" right? It's lettered with "California Republic." But have you heard of the "other" bear flag that's on a hooded sweatshirt at the Bohart Museum of Entomology at the...
Identification. Collaboration. Camaraderie. The scientists and butterfly/moth enthusiasts who gathered Saturday, Feb. 9 for the Northern California Lepidoptera Society meeting in the Bohart Museum of Entomology at the University of California,...
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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
UC researchers discover how grapevine red blotch virus diminishes winegrape value
Grapevine red blotch virus, a disease that is dramatically reducing the value of winegrapes in California's premium wine production region, is harming plants by inhibiting photosynthesis in the leaves, according to research published this month in the...
New project to build climate resilience through improved land management
A $4.6 million grant to UC Merced and UC Irvine will help UC Agriculture and Natural Resources researchers develop new tools and methods for California land owners to better manage the state's forests, shrub lands and grasslands. California's...
Researcher invites public to visit San Joaquin Valley soil health demonstration site in Five Points
UC Cooperative Extension cropping systems specialist Jeff Mitchell is issuing a standing invitation to the public to visit the site of an ongoing conservation agriculture research project and see for themselves the results of long-term soil-building...
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...
New Cannabis Research Center to explore environmental, social impacts of legalization
Cannabis is unlike any other agricultural crop. Because of its circuitous history — once illegal to grow, and now legal but heavily regulated — cannabis has cast a unique footprint on the environment and the communities of farmers...