Posts Tagged: Alda Pires
“The goal of our study is to provide organic farmers with science-based strategies that effectively limit food-safety risks when using raw manure-based soil amendments,” said Alda Pires, UC Cooperative Extension urban agriculture and food safety specialist in the School of Veterinary Medicine at UC Davis.
To study the survival of pathogens in soil and soil health, UC scientists are recruiting California growers who use raw or untreated manure in organically grown crop fields.
Pires is leading the project in California with Michele Jay-Russell, a veterinary research microbiologist and manager at the Western Center for Food Safety at UC Davis.
The researchers will visit participating farms eight times over the 2017-2018 growing season.
“We will collect produce, water, soil and manure samples,” said Jay-Russell. “All of the samples will be tested for bacterial indicators such as nonpathogenic E. coli and pathogens. We will ask the farmers to complete a short survey. The study is voluntary and all locations and names will be kept confidential.”
Eligible California farms must be certified as organic by the National Organic Program or California Certified Organic Farmers and fertilize with raw manure or untreated manure from dairy cattle, horses or poultry. The farms can grow any of the following produce: lettuce, spinach, carrots, radishes, tomatoes or cucumbers.
This study is being conducted in other states by the University of Minnesota, University of Maine, USDA Agricultural Research Service's Beltsville Agricultural Center, USDA Economic Research Service's Resource and Rural Economics Division, Cornell University and The Organic Center. The project is funded by a U.S. Department of Agriculture Organic Research and Extension Initiative grant.
A new UC study is looking at small to medium-size farms, both organic and conventional production, to identify on-farm food safety practices that are specific to farms that raise livestock and grow fresh produce. These are farms that sell their products directly to consumers at farm stands and farmers markets or through community supported agriculture (CSA).
“Much of the produce food-safety research in recent years has focused on large commercial farms,” said project co-leader Michele Jay-Russell, microbiologist and program manager at the Western Center for Food Safety at UC Davis. “In this study, we hope to identify best practices that may be unique for smaller operations and to share this information with the farmers.”
The 12-month study is being conducted on commercial farms in Northern California, from the Shasta Cascade region down to the Central Valley, including the coast. Fecal-borne pathogens can be spread to fresh fruits, nuts, and vegetables through animal intrusions, or indirectly through contaminated water or soil. The researchers are looking for the best practices that prevent pathogens from contaminating fresh market tomatoes and leafy greens such as lettuce and spinach.
“Raising livestock and growing fresh produce together for the local community presents certain opportunities and challenges from a food safety perspective,” said Alda Pires, UC ANR Cooperative Extension urban agriculture and food safety specialist in the School of Veterinary Medicine at UC Davis, who is leading the project with Jay-Russell, who is liaison to the Western Institute for Food Safety and Security.
“Our research aims to identify practical, scale-appropriate approaches that reduce risk from pathogens, while maintaining sustainable and economically viable family farms in Northern California,” said Jay-Russell, who has a small dairy goat herd in the Yuba Foothills.
Researchers will visit participating farms to collect samples of their produce, water, compost and livestock feces to test for bacteria. Farmers will be asked to complete a short survey about farm management practices. The testing is free and the farm identities are confidential.
“We anticipate publishing our results, without revealing farm names, next year and sharing the findings with the agricultural community through workshops and trainings,” said Pires, who grew up on a small family farm in Portugal.
A USDA National Institute for Food and Agriculture (NIFA) multi-state grant is funding this study and a similar study in the northeast – New Jersey, Maryland and Delaware – looking at microbial food safety issues potentially unique to small and medium-scale farms. The results of that study have been published in the International Journal of Food Microbiology and Applied Environmental Microbiology.
For more information about this food safety study, contact Alda Pires, UC ANR Cooperative Extension urban agriculture and food safety specialist, at (530) 754-9855 or email@example.com.