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Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

UC Cooperative Extension

ACP (Asian citrus psyllid) found in San Joaquin county

The ACP (Asian citrus psyllid) was found in Lodi and Manteca.  Click here to find out how you can help prevent the spread of this unwanted pest and what to do if you think you have it.

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.

UC Blogs

Bruce Hammock: Scientist Extraordinaire

Bruce Hammock is a new fellow of the National Academy of Inventors. (Photo by Kathy Keatley Garvey)

It's obvious that Bruce Hammock doesn't spend much time in a hammock. Research lab, yes. With colleagues, postdoctoral researchers, graduate students and undergraduate students, yes. Hammock, a distinguished professor of entomology at UC Davis who...

Posted on Friday, December 19, 2014 at 9:35 PM

Don't Miss Bohart Museum Open House Dec. 20: Insects and Art

Overwintering lady beetles, aka ladybugs, in Colusa County. (Photo by Greg Kareofelas)

When you use the words "insects," "art" and the "Bohart Museum of Entomology" in the same sentence, you immediately think of the artistic/scientific team of Fran Keller and Greg Kareofelas. And you'll meet them and see their amazing work at the Bohart...

Posted on Thursday, December 18, 2014 at 5:54 PM

Great ESA Student Debate Topic: Neonics

The UC Davis team included (from left) Margaret “Rei” Scampavia, Ralph Washington Jr., Jenny Carlson, captain Mohammad-Amir Aghaee and Danny Klittich. At far right is ESA president Frank Zalom of UC Davis who presented the team with its award. (Photo by Trav Williams of Broken Banjo Photography)

It was great to see the Entomological Society of America (ESA) select "neonicotinoids" as a student debate topic for its recent meeting in Portland, Ore. Bee health is a challenge, and this hot topic tied in with ESA President Frank Zalom's theme "Grand...

Posted on Wednesday, December 17, 2014 at 4:14 PM

Make a Gift Online

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

Ag Center May 2008


Event Name

UC Blogs

Sudden oak death symptoms are shown here on Grand fir. Photo by Gary Chastagner. Recycling Christmas trees helps curb the spread of pests
Posted 12/19/2014 - If you have a real Christmas tree, University of California pest management experts ask that you to recycle the tree to prevent the spread of insects and diseases that may harm our forests and landscape trees. “Invasive insects, diseases and plant...

Laetiporus sulphureus (chicken of the woods):  A showy and beautiful shelf-like mushroom, chicken of the woods is easy to spot because of its bright yellow color. They most frequently grow out of wounds on trees and each ‘shelf' can be up to 10 inches across. (Photo: Bruce Hagen) Oh the weather outside is fungal - It’s like a mushroom jungle
Posted 12/17/2014 - Mushrooms are popping up all over California thanks to the wet rainy weather we have had across the state recently. They seem to magically appear overnight, like umbrellas on a sunny beach day. This fascinating occurrence doesn't actually happen...

Growers can produce more nutritious alfalfa using new low-lignin variety, says UCCE's Dan Putnam. New GMO alfalfa holds exciting possibilities, UC expert says
Posted 12/16/2014 - Good news for dairy cows. Science has found a way to produce alfalfa with less lignin, a component of the plant that has no nutritional value. The new alfalfa variety – genetically modified in a way that puts brakes on the lignin-producing gene...

Mike De Lasaux demonstrates how foresters determine the age of a tree by taking a core sample and counting the rings. Teaching teachers about the environment outdoors
Posted 12/12/2014 - One approach to improving science literacy of children is to train their teachers in environmental education. Using the forest as a classroom, Project Learning Tree, now a program delivered through UC Cooperative Extension, educates teachers about the...

Nordmann fir Christmas trees are becoming popular on California farms because they have rich color, excellent structure, good needle retention and strong branches for ornament display. Christmas tree farmers growing Nordmann fir asked to look out for new pest
Posted 12/5/2014 - California Christmas tree growers who have planted Nordmann or Turkish fir on their farms should be watchful for a new pest that recently made its way to the United States, said Lynn Wunderlich, UC Cooperative Extension advisor who works with Christmas...

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