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

How to Become a California Master Beekeeper

This was the scene at the Harry H. Laidlaw Research Facility, UC Davis, for a testing of applicants for the California Master Beekeeper Program. (Photo by Kathy Keatley Garvey)

So you want to become a California Master Beekeeper. Yes! You can begin the process by registering on the California Master Beekeeper Program (CAMBP) website, announced program director and California Extension Apiculturist Elina Lastro Niño,...

Posted on Thursday, March 22, 2018 at 5:28 PM

The Bee and The Ladybug

A honey bee and a lady beetle, aka lady bug, thrust deep inside a mustard blossom. (Photo by Kathy Keatley Garvey)

A little drama in the mustard patch... A honey bee is foraging head-first in the mustard. She's collecting nectar and pollen. She does not see the lady beetle, aka ladybug,  thrust head-first above her. The honey bee is dusted with yellow pollen....

Posted on Wednesday, March 21, 2018 at 5:00 PM
Tags: honey bee (190), lady beetle (16), ladybug (20), mustard (8)

Bumbling Into Spring

A black-tailed bumble bee, Bombus melanopygus, heads for a nectarine tree in Vacaville, Calif. on March 18. (Photo by Kathy Keatley Garvey)

Might As Well Be Spring"I'm as restless as a willow in a windstormI'm as jumpy as puppet on a stringI'd say that I had spring feverBut I know it isn't spring."--Frank Sinatra Wait, it is spring! Today is the day we've all be waiting for--the first day...

Posted on Tuesday, March 20, 2018 at 2:48 PM
Focus Area Tags: Environment Natural Resources

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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

Ag Center May 2008


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UC Blogs

Rachel Surls (Click image to download high-resolution version.) UCCE advisor Rachel Surls receives 2018 Bradford Rominger Agricultural Sustainability Leadership Award
Posted 3/20/2018 - The Agricultural Sustainability Institute at UC Davis has announced that Rachel Surls, UC Cooperative Extension sustainable food systems advisor for Los Angeles County, is this year's recipient of the Eric Bradford and Charlie Rominger Agricultural...

Director of UC Cooperative Extension in Imperial County, Oli Bachie, is chair of the UC ANR Desert Workgroup. California’s desert agriculture is hot stuff
Posted 3/5/2018 - Stretching from the Death Valley to Calexico, California's vast dry desert is home to a unique and important agriculture industry. It's a place where summertime temperatures often top the 115-degree mark. Where water supplies for irrigation depend on...

UCCE farm advisor Davis Doll is featured in the CIWR drought video about almonds. Almond drought tips the focus of second video in drought series
Posted 3/2/2018 - Because periodic droughts will always be a part of life in California, the UC California Institute for Water Resources (CIWR) produced a series of videos to maintain drought awareness and planning, even in years when water is more abundant. The first of...

UCCE rangeland advisor meets with ranchers in the field to discuss rangeland management decisions. UCCE to be a leader in climate change awareness and education
Posted 2/21/2018 - Although individual extreme weather events cannot yet be reliably linked to global climate change, the warming planet may be contributing to recent weather disasters in California. Across the state, 129 million trees died as a result of the drought of...

The native California shrub toyon, or Christmas berry, blooms with white flowers in a hedgerow planted behind Rachael Long and a tomato grower. Good news for hedgerows: No effects on food safety in the field
Posted 2/15/2018 - Hedgerows enhance wildlife abundance and diversity around farmland without contributing to food safety problems in field crops, according to a new study published by a team of University of California researchers. The UC Agriculture and Natural...

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