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.
This "B" gets an "A" for good grooming. We recently watched a honey bee land on the edge of a planter. "Hmm," we thought. "Why is she landing there? She should be foraging on the flowers in the pollinator garden." We soon found out. After positioning...
Back in 2013 we purchased a stunning yellow rose, "Sparkle and Shine," at the UC Davis Rose Weekend. Well, it was a natural thing to do--a honey bee was on it! Honey bees aren't all that attracted to commercial roses, but this one was. Honey bees are...
It's about connecting. It's about learning where parents work and what they do. It's about fun. That's what will happen on Thursday, April 28 during the annual "Take Your Daughters and Sons to Work" day at the University of California, Davis. The UC...
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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
Women play key role in Nigerian agriculture
Posted 4/25/2016 - The most populous country in Africa, Nigeria has more than 180 million people. Located in West Africa on the Gulf of Guinea, Nigeria produces crops such as cassava, maize, sorghum, rice, yams, cowpea, oil palm and groundnuts. Agriculture is important for...
Sustainable grape production and precision viticulture
Posted 4/15/2016 - Grape acreage being removed from production and the strong demand for nut tree crops have grape growers concerned about the economic sustainability of grape production in the San Joaquin Valley. The gross income of grapes per acre depends on two...
Lake County plants 100,000 seeds to reforest area destroyed by Valley Fire
Posted 3/24/2016 - Lake County community groups have raised nearly $60,000 to reforest the areas ravaged by last September's Valley Fire. The funds have allowed the greenhouse planting of 100,000 native conifer seedlings that will be ready for distribution in time for...
How is climate change affecting agriculture? It depends.
Posted 3/22/2016 - Of 12 crops examined in Yolo County, walnuts are most vulnerable, while processing tomatoes and alfalfa acreage may increase due to warmer winters. In an effort to forecast how climate change may affect agriculture, University of California...
Invasive superweed Johnsongrass is the target of a new nationwide research effort
Posted 3/4/2016 - A team of researchers has received a $5 million grant from the U.S. Department of Agriculture to find new ways to combat Johnsongrass, one of the most widespread and troublesome agricultural weeds in the world. “Johnsongrass is a huge...