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.
Excitement is building for 40th annual Western Apicultural Society (WAS) conference, set Sept. 5-8 at the University of California, Davis, its birthplace. The non-profit educational organization, geared for small-scale beekeepers in the western United...
If you attend the Bohart Museum of Entomology open house from 1 to 4 p.m. on Sunday, Aug. 27, you'll learn all about bark beetles but you probably won't recognize the facility. It will be "Bark Beetle Forest Central," says Tabatha Yang, education and...
The sky darkens. The temperature drops several degrees. A breeze rustles the leaves of the African blue basil. Dogs bark. And off in the distance, a hawk shrills. A partial solar eclipse is about to happen in Vacaville, Calif. I am watching the...
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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
Powers of microbes: UC Davis graduate students get creative to teach farmers about soil microbiology
Posted 8/23/2017 - If you grew up in the 1980s or 1990s (or were a child at heart during that era), the famous Powers of Ten film likely left an indelible mark in your mind. The film starts with a couple lounging on a picnic blanket and zooms out to the outer reaches of...
August 19th is National Honey Bee Day: Dr. Elina Niño reminds us to help honey bees cope with pests
Posted 8/17/2017 - National Honey Bee Day is celebrated on the third Saturday of every August. This year it falls on Saturday the 19th. If you use integrated pest management, or IPM, you are probably aware that it can solve pest problems and reduce the use of pesticides...
New dust sources resulting from a shrinking Salton Sea have negative ecological and health impacts
Posted 8/8/2017 - UC Riverside study shows soils once submerged under the sea and airborne particulate matter are high in sodium and selenium Scientists at UC Riverside investigating the composition of particulate matter (PM) and its sources at the Salton...
How to check your citrus trees for a deadly disease and the pest that spreads it
Posted 7/28/2017 - The incurable citrus tree disease huanglongbing, or HLB, has been detected in Los Angeles and Orange counties and most recently in Riverside. The citrus disease is spread from tree to tree by Asian citrus psyllids, the insects that move...
UC has boots on the ground in an unrelenting search for Asian citrus psyllid
Posted 7/28/2017 - With two magnifying loops around her neck and a truck stocked with vials and tools for insect collection, Joanne O'Sullivan scouts Ventura County citrus orchards every day. She walks the perimeter, examining newly emerging leaves and tapping branches...