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.
Mark your calendar. If you want to learn about malaria and the exciting new research underway, be sure to set aside Friday, April 24. It's the fourth annual Bay Area World Malaria Day Symposium, co-hosted by the University of California, Davis, and...
The vibrant colors of Cosmos, an annual flower with the same common name as its genus, are spectacular. But we especially like the showstopping pink Cosmos with its bright yellow center. Well, sometimes, they have a green center--that's when an...
It's like winning the triple crown. The Pacific Branch of the Entomological Society of America (PBESA) has announced that two distinguished professors and a graduate student from the Department of Entomology and Nematology, University of California,...
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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
Extension conference to help practitioners reach winegrape farmers
Posted 3/23/2015 - A support network for California winegrape growers will gather in Lodi March 24-26 at the National Viticulture and Enology Extension Leadership Conference. UC Agriculture and Natural Resources plays a vital role in developing and extending research-based...
UC ANR and San Joaquin Valley cotton growers join forces to prevent sticky cotton in 2015
Posted 3/23/2015 - Last fall Kerman cotton farmer Paul Betancourt got a call from the gin manager where his crop was being processed and his heart dropped. The gin found sticky cotton. “It's like having an embarrassing social disease,” Betancourt said....
Five-foot zone free of plants can help rural homes’ fire survival
Posted 3/18/2015 - California law requires homeowners in wildfire-prone areas to create 100 feet of defensible space around their dwellings. UC Agriculture and Natural Resources (UC ANR) experts suggest going a bit farther by creating a five-foot buffer immediately...
UC to study the fate of street trees grown in increasingly popular bioswales
Posted 3/16/2015 - To keep pollution out of the ocean and natural creeks, California city planners are looking for creative ways to manage the large amount of water that falls during rain storms. More and more, they are building bioswales, shallow roadside basins designed...
Grasscycling can help Californians conserve water
Posted 3/5/2015 - Gov. Jerry Brown asked Californians to cut water use by 20 percent a year ago. Officials at the State Water Resources Board announced in March that water users haven't come close to meeting the conservation goal. To help homeowners save water while...