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.
Have you ever wondered who's behind the veil? The bee veil, that is. If you enroll in a beekeepers' course at the Harry H. Laidlaw Jr. Honey Bee Research Facility at the University of California, Davis, one of the instructors you're likely to meet...
Confessions of a Backyard Beekeeper. That's the title of a piece by former-Davis-mayor-turned-beekeeper Ann M. Evans in the newly published Ipinion Syndicate book, Cats, Dogs and Other Things that Poop in the Yard. "Here's what I know about...
Score another win for those woolly bear caterpillars. For the past three decades, woolly bear caterpillars have accurately predicted a Republican or Democrat win in the U.S. Presidential elections. This year, despite the pollsters, pundits and...
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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
Weather radar helps researchers track bird flu
Posted 12/7/2016 - The same weather radar technology used to predict rain is now giving UC researchers the ability to track wild birds that could carry the avian influenza virus. Avian influenza, which kills chickens, turkeys and other birds, can take a significant...
Wild horse over-population is causing environmental damage
Posted 12/6/2016 - Most Americans envision healthy mustangs galloping free on the range when they think about the country's wild horse population. But UC Cooperative Extension rangeland advisor Laura Snell sees another image. In conducting research on the over-populated...
Is 'palmageddon' coming to California?
Posted 12/6/2016 - Representatives from the date and ornamental palm industries, arborists and pest managers, parks and recreation officials, and home owners are uniting behind a University of California, Riverside initiative to slow the spread of the South American...
Migrating bats may be resting, not sick, says UC bat expert
Posted 11/10/2016 - California is in the middle of the Pacific Flyway, a major north-south flyway for migratory birds, and also bats, that extends from Alaska to South America. “Every autumn, migratory bats, such as the Mexican free-tailed bats, travel to their...
With conservation agriculture, Firebaugh farmers use half the nitrogen and a third less water
Posted 11/3/2016 - How do you cut your water use by a third, cut your nitrogen use in half, maintain your tomato yield and improve your fruit quality? “With patience, perseverance and by treating your soil like a living ecosystem — which it is,”...