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.
Just call them "snuggle bugs." Or "snuggle bees." After spending the day chasing the girls and defending their patch of Mexican sunflowers or Tithonia, a cluster of Melissodes robustior males settled down for the night. Their bed...
Hurray for the red, white and blue! One more day until we celebrate the birth of our country, Independence Day, and the patriotic colors will be out in force. Insects, also, can be red, white and blue. Take the red...
They're good bees. You can take that to the bank! The excitement began when Martin Guerena, an integrated pest management (IPM) specialist with the City of Davis, encountered a native bee nesting site Wednesday in front of the U.S. Bank, corner of 3rd...
Make a Gift Online
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
What do you know about ants?
Posted 7/7/2015 - What do you know about ants? If you think they're just uninvited guests at your picnic or something to spray or stomp, think again. They're marvelous creatures, as any ant specialist will tell you. You can learn about them from noted ant...
New app helps strawberry growers manage pests
Posted 6/16/2015 - IPMinfo, the first app from UC Agriculture and Natural Resources (UC ANR) that provides integrated pest management (IPM) information to farmers, is now available for free download for iPhones on the App Store. The current...
The public is invited to the California Nitrogen Assessment’s Stakeholder Review Process
Posted 6/10/2015 - California farmers are seeing new nitrogen monitoring requirements they must implement in the years ahead. The state of California continues discussion on how growers can improve nitrogen use efficiency and how California can best respond to increasing...
Forest and tree health in a time of drought
Posted 6/8/2015 - The fourth winter in a row of disappointing precipitation has triggered a die off of trees in the Sierra Nevada, most of which is now in ‘exceptional drought' status. The US Forest Service conducted aerial monitoring surveys by airplane in April...
Here are your clues: A helmet, a feather duster and a tape measure…
Posted 6/3/2015 - It's hard to keep up with all the changes in K-12 education standards. We hear about the evolution of Common Core and Next Generation Science standards as well as curriculum offered through the Environmental Education Initiative. All programs stress the...