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.
If you attended the 2017 Entomological Society of America (ESA) meeting, held recently in Denver, you probably recognized a familiar face and his research. Myrmecologist (ant specialist) Brendon Boudinot, doctoral candidate in the Phil Ward lab, UC...
Last summer you may have happened upon praying mantids mating. Hopefully, the male didn't lose his head. Which begs a question asked by a reader: How long after mating does the female lay or produce her egg case (ootheca)? "Usually it takes a week or...
Think about this: You don't know until you try. You miss every opportunity you do not take. Each answer to a question creates new questions. So began UC Davis alumnus Matan Shelomi when he returned to the UC Davis campus Wednesday, Nov. 15 to...
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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
Videos show hikers how to avoid Black Friday stampedes on park trails
Posted 11/17/2017 - While Americans traditionally beat a path to the malls the day after Thanksgiving, many opt out of shopping on Black Friday to enjoy the outdoors. In regional parks and other open spaces, hikers may encounter crowds of a different sort – cattle...
Barn owls help clean up rodents naturally
Posted 11/13/2017 - The screech of a barn owl at night may be startling or annoying to some. But others may find their harsh calls satisfying, knowing that barn owls are out, feeding on pesky rodents. They're fierce hunters with a voracious appetite for mice, voles,...
Digging Deep: Exploring the diversity of soils in the Sacramento Valley
Posted 10/30/2017 - Not more than three months on the job and Konrad Mathesius is hard at work bringing farmers together to discuss the unique challenges that Sacramento Valley farmers face. As the new UCCE agronomy advisor for Sacramento, Solano and Yolo counties, his...
Cannabis crop expansion into forests threatens wildlife habitat
Posted 10/30/2017 - Planting cannabis for commercial production in remote locations is creating forest fragmentation, stream modification, soil erosion and landslides. Without land-use policies to limit its environmental footprint, the impacts of cannabis farming could...
Replanting the Sierra Nevada after an ecological catastrophe
Posted 10/25/2017 - Given California's changing climate, should Sierra Nevada residents replant pine trees after so many died during the 2010-2016 drought? The short answer is yes, says Susie Kocher, UC Cooperative Extension forestry advisor. “We have every reason to...