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.
If you've ever watched a Gray Hairstreak butterfly (Strymon melinus) nectaring a sedum, and then watched a honey bee (Apis mellifera) land on the same flower, it's a study in sharing. "I was here first," says the Gray Hairstreak, sipping nectar. "I was...
Follow that buzz! When the California State Beekeepers' Association, founded in 1889, meets Nov. 18-20 in Valencia for its 2014 convention, it will mark a milestone: 125 years of beekeeping. Not so coincidentally, the theme is "Celebrating 125...
Bees 'n blooms. Blooms 'n bees. Add "California" to it and you have California Bees and Blooms: A Guide for Gardeners and Naturalists. It's a book that's well-planned, well-executed, well-written and well-photographed. Bees are hungry. What plants...
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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
Students design a solar home for farmworkers
Posted 10/22/2014 - When a team of UC Davis students packs up its house and travels to Irvine next year for the U.S. Department of Energy's 2015 Solar Decathlon competition, its members will bring not only a desire to win, but also to make zero-net-energy homes...
Ranching and California's drought: A workshop & webcast
Posted 10/21/2014 - One image has had every Californian cringing this year: the U.S. Drought Monitor map. Like a slice of molding bread, the drought began in the middle, grew darker and moved outward in concentric rings that gradually devoured the state. The reaction...
A guide for California wanna-bees
Posted 10/15/2014 - The 1,600 species of wild bees that buzz their way to California gardens and green spaces get hungry, and there's a lot city dwellers and suburbanites can do to create an appealing buffet for the valuable pollinators. California Bees & Blooms: A...
When your fish pond is an egret's sushi buffet
Posted 10/8/2014 - Ah, the joy of a fish pond. Goldfish swimming lazily beneath pink waterlilies, doves splishing and splashing, frogs jumping and croaking, dragonflies darting and ambushing, and honey bees collecting water, trip after trip, for their...
Conservation organization California Trout helps establish endowed chair at UC Davis
Posted 9/30/2014 - California once teemed with millions of native salmon, trout and steelhead. The state has 31 distinct types of these iconic, majestic fish. But decades of degradation to aquatic habitat has depleted their numbers in many areas of the state. According...