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.
So here's this hungry male monarch butterfly sipping nectar from a Mexican sunflower (Tithonia rotundifolia "Torch"). He's sipping, sipping, sipping. He's minding his own business. He's tending to his own needs. It's a good day in the pollinator...
What a great idea! The Horticulture Innovation Lab Demonstration Center on the UC Davis campus is spearheading a "Pitch & Plant Gardening Contest." They're looking for folks to (1) pitch an idea for a raised bed and (2) plant it and nurture it from...
Ruth Charlotte Risdon Storer (1888-1986) would have been proud. The garden that bears her name in the UC Davis Arboretum is Nature at its Best, especially this time of year. It's better known as the Storer Garden, but a plaque spells out the entire...
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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
Root out weed problems with upcoming courses at UC Davis
Posted 6/22/2016 - Weeds are a pervasive and expensive problem in California. They can choke waterways, crowd out native species on rangeland, and rob farmers of crop yields. According to the California Invasive Plant Council, the annual cost of invasive plant work in...
Insight into the environmental impacts of cannabis agriculture
Posted 6/21/2016 - As policy liberalization rapidly transforms the multi-billion-dollar cannabis agriculture industry in the United States, the need for regulation and assessment of environmental impacts becomes increasingly apparent. A recent study led by UC...
Top 10 pests in gardens and landscapes and how to control them
Posted 6/10/2016 - Download the free booklet at the bottom of the page! 1. Ants Most people deal with ants around their home at some point. Because most ants live outdoors, focus efforts on keeping ants from entering buildings by caulking entryways. Follow good...
Russell Ranch field day at UC Davis is June 8
Posted 6/1/2016 - The Russell Ranch Sustainable Agriculture Facility, located near the UC Davis campus, will be holding its annual field day June 8 on the theme of "Farm Water Management in Times of Scarcity." Members of the public are encouraged to...
UC sheep shearing school prepares students for gainful employment
Posted 5/31/2016 - Sheep shearing is like a dance. It requires strength, flexibility, a tender touch and the right moves. Once mastered, the skill can open the door to gratifying and high-paying seasonal work. “I tell my sheep shearing students, ‘You'll never...