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Napa, CA, United States

Morandin L.,University of California at Berkeley | Long R.F.,UC Cooperative Extension | Pease C.,University of California at Davis | Kremen C.,University of California at Berkeley
California Agriculture | Year: 2011

Hedgerows of native California shrubs and perennial grasses bordering field crops were examined for the abundance of beneficial and pest insects compared with adjacent weedy areas. During 2 years of sampling in the Sacramento Valley, hedgerows attracted more beneficial than pest insects, while weedy areas showed the opposite trend, attracting signifcantly more pest than beneficial insects. We conclude that replacing weedy areas at field crop edges with managed hedgerow plantings will sustain or increase beneficial rather than pest insects on farms.

Blackburn M.L.,UC Cooperative Extension | Gillogy B.,The American College | Hauselt P.,California State University, Stanislaus
California Agriculture | Year: 2010

Inadequate diet and nutrition can contribute to or exacerbate chronic and acute diseases, hasten the development of degenerative diseases associated with aging, and delay recovery from illness. No single segment of society can benefit more from improved diet and nutrition, and regular exercise, than the elderly. While links between diet, exercise and chronic-disease risks are well documented, more research is needed on how best to use quality-of-life approaches and perceived benefits as motivators for behavior change among the elderly. This report explores how physiological components affect the nutrition and wellness of seniors, puts into context the status of related research, and helps establish a framework to reassess UC Cooperative Extension priorities for applied research, education and outreach to California's elderly population.

Vossen P.M.,UC Cooperative Extension
California Agriculture | Year: 2011

California's olive oil industry has evolved from primarily a salvage operation of the table olive industry to a producer of world-class, premium, extra-virgin olive oil. In 1997, UC Cooperative Extension started the first California olive oil taste panel, which was officially recognized by the International Olive Council in 2001. Specific protocols were used to screen potential panelists and train them to identify defects and positive characteristics, identical to 43 other world taste panels. The UCCE panel helped the California Olive Oil Council develop a seal certification program using sensory analysis. Certification provides consumers with assurance that labeled oils are free of defects and warrant the "extra virgin" grade. Sensory evaluation using a unique UCCE profile sheet provides complete and detailed information about specific positive flavor characteristics of olive cultivars grown in California. The UCCE sensory panel has also contributed to a better understanding of the qualities of California olive oil and advancement of the industry by participating in research on pest management, cultural practices and processing.

Long R.F.,UC Cooperative Extension | Morandin L.,University of California at Berkeley
California Agriculture | Year: 2011

Onion thrips, previously considered of minor importance to hybrid onion seed production in California, vector the newly introduced iris yellow spot virus, a serious pathogen of onions that can cause significant yield losses. Insecticide use to control onion thrips has increased in onion seed fields, coincident with a steep decrease in yields, especially in Colusa County. We examined a number of possible contributing factors and found a strong positive correlation between honey bee activity and onion seed set, indicating that a lack of pollination may be contributing to the reduced yields. In addition, honey bee visits to onion flowers were negatively correlated with the number of insecticides applied per field and field size. Reduced onion seed yields in recent years could be associated with the increase in insecticide use, which may be repelling or killing honey bees, important pollinators of this crop.

Markle J.C.,Coalition for Urban Rural Environmental Stewardship Davis | Niederholzer F.J.,UC Cooperative Extension | Zalom F.G.,University of California at Davis
Pest Management Science | Year: 2016

BACKGROUND: Gear Up/Throttle Down (GUTD) and Inward Only strategies represent potential alternatives to conventional airblast applications to reduce spray drift. This study evaluates Inward Only and a modified version of GUTD in almonds, the largest US tree crop, at the recommended hull split treatment timing for control of navel orangeworm (NOW), the key almond insect pest. RESULTS: Conventional treatment produced the most drift (15.6% of total bifenthrin load), while the GUTD and Inward Only treatments produced only 7.6 and 9.7% respectively. For all methods, 92-94% of the drift was found in the first 15.2m downwind of the orchard. NOW control was lower for the Inward Only treatment compared with the GUTD and conventional treatments. NOW control was consistently lower at 4.88m height relative to 2.44m in all treatments, reflecting the reduced deposition higher in the tree canopy recorded in deposition samples. CONCLUSION: While Inward Only treatments reduced spray drift relative to the conventional application method, poorer control of NOW, the key insect pest of almonds, in the Inward Only treatment would likely limit its voluntary use by growers. However, GUTD holds promise for use at the hull split treatment timing to address spray drift. © 2016 Society of Chemical Industry.

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