UC Cooperative Extension
ACP (Asian citrus psyllid) found in San Joaquin county
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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.
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And thousands of volunteers extend the reach of our work through the Master Gardener Program and the California 4-H Youth Development Program.
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Will all the pollinators please stand up! Or do a fly-by like the Blue Angels or a crawl-by like babies competing in a diaper derby. Bees--there are more than 4000 of them in North America--are the main pollinators, but don't overlook butterflies,...
The circle of life... Monarch caterpillars feast on milkweed, their host plant. Oleander aphids feast on the juices of milkweed plants. Lady beetles, better known as ladybugs (but they're beetles, not bugs) feast on the aphids. The milkweed...
Dragonflies are fierce predators but they are predator-shy. "If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck," as the saying goes. If you look like a predator, walk or fly like a predator and act like...
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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
Antibiotic drug use in food animals focus of October workshop
Posted 10/8/2015 - New guidelines being implemented by the U.S. Food and Drug Administration – effective Jan. 1, 2017 - require label changes allowing only therapeutic uses of some medically important antimicrobial drugs, and call for increased veterinarian oversight...
Low residual dry matter on rangeland a concern heading into wet season
Posted 10/2/2015 - Over the past few years, drought has negatively affected everyone in the state and ranchers are no exception. Due to the drought, most areas have seen a decline in forage production and water availability, and as a result many livestock producers reduced...
Use compost for water conservation
Posted 9/28/2015 - Some of the best practices for maintaining healthy home gardens and landscapes also cut water use, a particularly important benefit during the drought. That's the case with compost. UC Agriculture and Natural Resources' environmental horticulture...
Sudden oak death moving to urban areas; 3 steps to protect oaks
Posted 9/25/2015 - Drought is decreasing but not defeating the pathogen that causes sudden oak death, according to a citizen science-assisted survey conducted this spring by a UC Agriculture and Natural Resources forest pathologist. Results of the 2015 Sudden Oak Death...
Children’s magazine focuses on rangeland animals
Posted 9/24/2015 - Rangeland is where deer and antelope play. It is also home for grazing livestock and many other animals. “Almost half of the land on Earth is rangeland and one-third of the United States is rangeland,” the latest issue of Jr. Animal Scientist...