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.
"Got 'em!" That's the message we've all been waiting for. Several of us bumble bee enthusiasts--Robbin Thorp, distinguished emeritus professor of entomology at UC Davis, photographers Allan Jones and Gary Zamzow of Davis, and yours truly--have been...
There's good news and not-so-good news about the Western Monarch Thanksgiving Count in California. Last December the Xerces Society for Invertebrate Conservation released preliminary figures. Now they've announced the final tally: almost 272,000...
You could say that noted entomologist/author Stephen Buchmann has a thing for buds, bees, beetles and butterflies...buds that burst into flowers, and bugs that burst into pollinators. The UC Davis-trained entomologist, author of the newly published...
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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
First national celebration for citizen science in April
Posted 2/11/2016 - Citizen science is really picking up steam with the White House honoring 12 “Champions of Change” for their dedication to increasing public engagement in science and science literacy and the recent launching of a new Citizen Science...
The UC Pest Management Guidelines just got spicier!
Posted 2/4/2016 - Whether or not your favorite team is playing in Sunday's big game, the Super Bowl is often a great excuse to gather with friends and family and enjoy some tasty treats. Maybe your favorite snack involves chips with salsa or guacamole, or perhaps you...
Research can help Californians live safely with wildlife
Posted 1/15/2016 - Winter is typically lambing season on Northern California sheep ranches - a perilous time of year. Baby lambs are vulnerable prey for wildlife like coyotes, mountain lions and bears. With increasing numbers of wildlife, both rural and urban neighborhoods...
International experts to discuss water pricing Feb. 2-3 in Sacramento
Posted 1/13/2016 - Although rain has begun falling in California after four years of drought, living with limited water is the new normal for Californians, according to University of California water experts. To manage its water for the future, California needs to look...
Pastured poultry farm to foster innovation for small chicken farms
Posted 12/16/2015 - UC Agriculture and Natural Resources (UC ANR) provided seed money to launch a new Pastured Poultry Farm at UC Davis. The farm is home to 150 young chickens and a living laboratory where students and faculty researchers hope to develop innovative...