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.
Oleander aphids, those cartoonish-looking yellow insects with black legs and cornicles, are commonly found on oleanders. Hence their name. But they also are partial to milkweeds, the host plant of the monarch butterfly. It's a daily challenge to rid...
If you plant it, they will come. Western tiger swallowtails (Papilio rutulus) can't get enough of our butterfly bush. For the first time ever, we saw two of them and managed to get both in the same image. Courtship? Curiosity? Chance...
Some folks dislike photos of praying mantids snagging, killing and eating their prey. Well, often the "eating" part comes before the "killing" part. Still, they have to kill to live. We all do. Or someone does it for us. We've been seeing...
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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
Drought concerns causing unnecessary impact on landscapes and lawns
Posted 7/31/2015 - Following Gov. Brown's call to remove 50 million square feet of turf in California to conserve water, cities across state are now offering rebates to residents willing to pull out their plants and lawns. However, UC Agriculture and Natural Resources (UC...
Wildfires are unpredictable, but preparation can help protect homes and animals
Posted 7/29/2015 - Four years of drought has left California with acres of dry brush and dying trees, abundant fuel for wildfires. Currently, CalFIRE's fire map shows several major fires burning in California. “There are two factors that help fires spread - winds...
California almonds have small carbon footprint compared to other protein foods
Posted 7/23/2015 - California produces more than 80 percent of the world's commercial almonds. Popularity of the nuts has spurred almond acreage in the state to expand from 510,000 acres in 2000 to roughly 890,000 acres in 2015, according to the USDA National Agricultural...
Drought is impacting California’s wildflowers
Posted 7/15/2015 - Native wildflowers in California are losing species diversity after multiple years of drier winters, according to a study from the University of California, Davis, which provides the first direct evidence of climate change impacts in the state's...
The drought needs not be a death sentence for lawns
Posted 7/13/2015 - While a golden brown lawn is seen as a badge of honor to some residents of drought-stricken California, in fact, they are doing more harm to the environment than good, says UC Agriculture and Natural Resources turf expert Jim Baird. “People have...