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.
Who invited bugs to the UC Davis Picnic Day? Well, UC Davis officials and the UC Davis Department of Entomology and Nematology did! Yes! All systems are "go" for the 104th annual UC Davis Picnic Day, an all-day event on Saturday, April 21 when scores...
Take heed. The 104th annual UC Davis Picnic Day theme is “Where the Sun Shines.” The sun is expected to shine throughout much of the campus on Picnic Day, Saturday, April 21, but it won't be shining in this place. Not a chance. It's where...
Honey has been called "the nectar of the gods" and "the soul of a field of flowers." Whatever it's called, it's all good. And when the UC Davis Department of Entomology and Nematology hosts a honey tasting on Saturday, April 21 as part of the UC Davis...
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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
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...
UC study seeks street trees that can cope with climate change
Posted 4/18/2018 - The changing climate predicted for California – including less rain and higher day and nighttime temperatures – is expected to cause chronic stress on many street tree species that have shaded and beautified urban areas for...
Mandarin drought tips featured in final video of drought series
Posted 4/6/2018 - Because periodic droughts will always be a part of life in California, the UC California Institute for Water Resources (CIWR) produced a series of videos to maintain drought awareness and planning, even in years when water is more abundant. The final...
UCCE advisor Rachel Surls receives 2018 Bradford Rominger Agricultural Sustainability Leadership Award
Posted 3/20/2018 - The Agricultural Sustainability Institute at UC Davis has announced that Rachel Surls, UC Cooperative Extension sustainable food systems advisor for Los Angeles County, is this year's recipient of the Eric Bradford and Charlie Rominger Agricultural...
California’s desert agriculture is hot stuff
Posted 3/5/2018 - Stretching from the Death Valley to Calexico, California's vast dry desert is home to a unique and important agriculture industry. It's a place where summertime temperatures often top the 115-degree mark. Where water supplies for irrigation depend on...