Posts Tagged: healthy

Organic strawberry yields boosted by technique refined through UCCE research

There is a stark difference in plant vigor between an ASD-treated plot (left) and a standard untreated plot in an organic field infected with charcoal rot. Photo by Joji Muramoto

Anaerobic soil disinfestation helps suppress weeds, disease without fumigants

Troubled by puny plants, low yields and persistent mite problems, third-generation Southern California strawberry grower Glen Hasegawa was ready to give up on his transition from conventional to organic 12 years ago.

“I've always liked a challenge – but it turned out to be more of a challenge than I thought it would be!” he said.

But then, with the help of scientists including Oleg Daugovish, UC Cooperative Extension strawberry and vegetable crop advisor in Ventura County, Hasegawa tried a technique called anaerobic soil disinfestation (ASD). When applied correctly, the multi-step ASD process creates a soil environment that suppresses pathogens and weeds and makes for healthier, more robust crop growth.

“Back in the day, it was really hard to get the plant growing vigorously in organic,” said Hasegawa, owner of Faria Farms in Oxnard. “So we started using the ASD and then you could definitely see that the plant had more vigor and you could grow a bigger, better plant using it.”

Seeing that he could produce yields “in the neighborhood” of those grown in conventional strawberry fields fumigated with synthetic fumigants, Hasegawa was able to expand his original 10 acres of organic strawberries to 50 acres.

“I guess you could say I'm kind of a convert,” he said, noting that he now applies ASD to all his acreage each year in late spring.

Joji Muramoto, UC Cooperative Extension specialist in organic production based at UC Santa Cruz, has been experimenting with ASD since it was first brought to the U.S. from the Netherlands and Japan in the early 2000s. Carol Shennan, a professor in the Department of Environmental Studies at UCSC, and Muramoto were among the first to try the technique in California. They found that ASD successfully controlled an outbreak of Verticillium wilt – caused by the pathogen Verticillium dahliae – at UCSC's small organic farm in 2002.

Since then, Shennan, Muramoto, Daugovish and their colleagues have seen encouraging results at 10 trial sites across the state.

“We demonstrated that ASD can provide comparable yields with fumigants, in side-by-side replicated trials,” Muramoto said.

The strawberry plants in the ASD-treated plot (left) are more robust than those growing in untreated soil. A plastic mulch (typically opaque is used by growers, but clear was used here for research purposes) is crucial as part of the ASD process to improve plant productivity and control weeds. Photo by Oleg Daugovish

ASD promotes host of beneficial changes to soil ecosystem

ASD comprises three basic steps: incorporating a carbon source that is easily digestible by microbes in the soil (traditionally, rice bran has been used), further encouraging fermentation by covering the soil with plastic to limit oxygen supply, and finally adding water through drip irrigation to initiate the “anaerobic” decomposition of the carbon source and maintain the three-week “cooking” process.

The resulting cascade of chemical, microbiological and physical changes to the soil creates an ecosystem that is both conducive to strawberry growth – and inhospitable to pathogens and weeds.

“It's not like a pesticide where you have a mode of action, and thus resulting in ‘A' and ‘B' for you,” Daugovish explained. “There's a sort of cocktail of events that happens in the soil; they all happen interconnectedly.”

Compared to similar fields that did not undergo the process, ASD-applied organic strawberry fields across California have seen yields increase by 60% to 70% – and even doubling in some cases, according to Daugovish.

The UCCE advisor also shared the story of a longtime grower in Ventura County, who came to him with fields in “miserable” condition; they were plagued by one of the world's worst weeds, yellow nutsedge, and infected with charcoal rot, a disease caused by the fungus Macrophomina phaseolina. But after applying rice bran and following the ASD recipe, the grower saw phenomenal results.

“The only complaint he said to me was, ‘Now I have too many berries – we have to have more pickers to pick the berries!'” Daugovish recalled.

Via researchers' meetings, online resources, on-farm demonstration trials and word of mouth from peers, use of ASD by California strawberry growers has grown significantly during the past two decades. Tracking the purchase of rice bran, Muramoto estimated that about 2,500 acres were treated by the ASD-related practices in 2023 – covering roughly half of the 5,200 total acres of organic strawberries in California.

Muramoto directly links the growth of California organic strawberry production – which now comprises about 13% of total strawberry acreage in the state – with the increasing adoption of ASD.

“If you remove the acreage with the applied rice bran over the last 10 years or so, organic strawberry acreage is just flat,” he said.

Applying rice bran provides the easily digestible carbon source that soil microbes feed on. Once covered by plastic mulch, anaerobic conditions develop and microorganisms that prefer such an environment thrive, while pathogenic organisms and germinating weeds are suppressed. Before planting, holes are cut in the plastic to let oxygen back into the soil and encourage the growth of the strawberry plants. Photo by Oleg Daugovish

Within the last decade, acreage of organic strawberries with ASD-related practices increased by 1,640 acres, which is a boon for air quality, human health and long-term soil vitality. According to Muramoto's calculations, that increase in organic acreage translates to a reduction of about 465,000 pounds of fumigant active ingredients that would have been used in growing conventional strawberries.

“There are hundreds of reports of acute illnesses related to fumigation in the record, so it's very important to find alternatives to fumigants,” said Muramoto, citing California Department of Pesticide Regulation documents.

Research continues to make ASD more economical, effective

The popularity of ASD has come at a price, however, for organic strawberry growers.

“There's more organic out there, and I think most of the organic guys are using it, so there's more demand on the rice bran; the price has been steadily going up every year, like everything else,” said Hasegawa, adding that he has been trying to decrease the amount of carbon while maintaining ASD's efficacy.

On top of greater demand from other growers and from beef cattle and dairy producers (who use rice bran as feed), the price also has increased due to higher costs in transporting the material across the state from the Sacramento Valley. So Daugovish and his colleagues – including Peter Henry, a U.S. Department of Agriculture plant pathologist – have been searching for a cheaper alternative.

“We all want an inexpensive, locally available, reliable, easy to use and functional carbon source, which sounds like a big wish list,” Daugovish said.

Carbon sources such as bark, wood chips, or compost are ineffective, as the crucial ASD microorganisms are choosy about their food.

In a field of 'Victor' strawberries, researchers saw a 41% increase in yield using ASD with midds, in comparison to untreated soil. Photo by Oleg Daugovish

“Microbes are just like cows; you can't feed them straight wood; they get pretty angry,” Daugovish explained. “And if you feed them something with too much nitrogen, they can't digest it – they get the runs. Microbes are the same way – you have to have the right proportion of stuff so they feel comfortable doing what they're doing.”

In search of an ideal replacement, researchers tried and ruled out grass clippings, onion waste, glycerin and coffee grounds. Finally, they pivoted to a material with properties very similar to rice bran: wheat bran, in the form of wheat middlings (also called midds, a byproduct of flour milling) and dried distillers' grain (DDG, a byproduct of ethanol extraction).

After field experiments in Santa Paula, the UC and USDA researchers found that midds and DDG were just as effective at controlling soilborne pathogens and weeds as rice brain – but at 25% to 30% less cost. Their results were published last year in the journal Agronomy.

“Not surprisingly, the wheat bran has worked almost exactly the same as rice bran,” Daugovish said.

He and Muramoto are now conducting trials with wheat bran at commercial fields, and the initial results are promising. Daugovish said the grower at one site in Ventura County has seen a 90% reduction in Macrophomina phaseolina, the causal pathogen of charcoal rot, in the soil – and an 80% to 90% drop in yellow nutsedge germination. They are waiting for final yield numbers after the coming summer.

While ASD has been beneficial to organic productivity and soil health, both Daugovish and Muramoto acknowledged specific limitations in suppressing the “big three” strawberry diseases: Verticillium wilt, Fusarium wilt and charcoal rot. In coastal areas with cooler soil temperatures, for example, ASD can actually exacerbate the latter two diseases, as the fungal pathogens feed on the rice bran.

“We know it works at warmer temperatures, but, practically, it's hard to do in coastal California,” Muramoto said. “It would be nice if we can find a way to suppress Fusarium wilt at a lower temperature, but we don't have it right now.”

That's why researchers emphasize that ASD is not a “silver bullet.” It's just one tool in the organic toolbox, which includes careful crop rotation, disease-resistant strawberry varieties and better diagnostic tests that help growers pinpoint outbreaks and make the application of various methods more targeted and more efficient.

And scientists will continue to optimize ASD to make it more effective and economical for growers in the different strawberry regions of California – from the Central Coast to the Oxnard Plain.

“We know it can work really well; it's just finding the most sustainable way to do this in our region,” Daugovish said. “We've got to just have an open mind and keep trying.”

Study: Government shutdown stressed food assistance program participants

Uncertainty caused by a government shutdown adds to the stress of people grappling with food insecurity. Photo by Evett Kilmartin

A U.S. federal government shutdown can represent a minor inconvenience, a delay in paychecks, or – for people living in some of the most difficult circumstances – an extended period of hunger and anxiety.

A study published recently in the journal Nutrients provides a unique glimpse into the shutdown experiences of participants in CalFresh – California's name for the federally funded Supplemental Nutrition Assistance Program (formerly known as food stamps). Currently, about 42 million people participate in SNAP across the U.S.

In focus groups conducted in 2019 with 26 low-income CalFresh participants from four diverse California counties, participants shared how the 2018-19 federal government shutdown affected their SNAP benefits, their perception of the program and their faith in government.

One of the immediate effects of the 2018-19 shutdown was that February CalFresh benefits were distributed in January. And while that meant program participants saw extra benefits that month, they then had to wait 40 to 44 days until the March issuance – much longer than the usual 28 to 31 day cycle.

“What we saw with this study is that this extended lag in benefit receipt from January to March was devastating,” said Wendi Gosliner, senior researcher and policy advisor at the Nutrition Policy Institute of UC Agriculture and Natural Resources, and an author of the study funded by UC ANR.

She recalled one participant who, despite having a gastrointestinal issue that requires a special diet, had to eat canned food from the food bank that made her sick – rather than go hungry while waiting for her March benefits. Others described cascading financial challenges after using rent money for food in February, or going into debt to pay for food and getting behind on other expenses.

The study also chronicles the experiences of a woman who was anguished to hear the suffering of her daughter, also a CalFresh participant: “She called me several times crying, ‘Ma, I don't – we don't have enough food. What am I going to do…? You know, I can't afford to this and this and this.' And I can't help her.”

For individuals grappling with food insecurity, the stress of feeding their families was compounded by the uncertainties of the government shutdown. And while many participants exercised their agency and resourcefulness in coping with the situation, they also felt a degree of powerlessness amid the “confusion and craziness,” as one person put it.

“No one knew how long that shutdown was going to last; no one knew if the March benefits were going to be paid,” Gosliner said. “And as we learned, there were all kinds of stories circulating out there about what was going on with the uncertainty – a lot of people didn't have the information about what was actually happening.”

Some participants, seeing the “double benefit” in January 2019, thought that it was the last-ever distribution and that SNAP was ending. Others described being unable to get in touch with the CalFresh agency to get their questions answered about the benefits. Most participants had not heard about the disrupted benefit schedule before receiving the benefits. As a result, many people in the focus groups shared that their overall faith in government had been shaken.

Improving customer service, boosting benefit levels and adjusting eligibility and benefit formulas to reflect high cost-of-living and expenses related to working were three recommendations that came from the focus group participants.

A fourth recommendation tackles the shutdown issue head-on: Don't let it happen again.

“Congress should do absolutely everything in their power to be sure that the program operates on the usual time schedule – even if the government is shut down,” Gosliner said.

In the context of the global pandemic, when financial and social inequities and physical and mental health disparities have been laid bare, ensuring access to healthful food is even more important. And with studies showing that hospitalizations increase with longer lags between SNAP distributions, Gosliner said the “absolute last thing” the overburdened health system needs is more people in emergency departments seeking acute care.

“It's the worst time to be having people who need money to feed their families face additional insecurity,” she said. “It's critically important that Congress acts to be sure that there is not any disruption in benefits.”

The authors of the study, “Participants' Experiences of the 2018–2019 Government Shutdown and Subsequent Supplemental Nutrition Assistance Program (SNAP) Benefit Disruption Can Inform Future Policy,” are Wendi Gosliner, Wei-Ting Chen, Cathryn Johnson, Elsa Michelle Esparza, Natalie Price, Ken Hecht and Lorrene Ritchie.

The study can be found online at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7353319.

CalFresh Healthy Living, UCCE educators and promotoras teach children gardening to encourage healthy eating

When local promotoras - volunteer health workers - team with CalFresh Healthy Living, UC Cooperative Extension educators, magic happens in school gardens. Trained by Ceres Partnership for Healthy Families in Stanislaus County, promotoras encourage children to eat well by growing their own produce in school gardens.

In 2018, twenty promotoras  were trained to implement the Powerful People curriculum designed to engage community leaders. This is a partnership with Cultiva La Salud and Ceres Partnership for Healthy Families with funding support from Stanislaus County Health Services Agency. After the training, the promotoras worked with Ceres Unified School District to create school gardens at five Ceres elementary schools where their children attended afterschool programs that host UC Cooperative Extension CalFresh Healthy Living, UC programs.

A key initiative CalFresh, Healthy Living, UC (CFHL) offers in counties throughout the state involves growing fresh produce and making it a regular part of family diets. TWIGS: Youth Gardening and Healthy Eating Curriculum is a UC Agriculture and Natural Resources comprehensive curriculum with 16 garden lessons and 15 nutrition lessons available for free download from its website.

A group of kids water their school garden.

CFHL has teamed with promotoras in Stanislaus County since 2018 to ignite local participation in teaching children that participate in garden clubs about plant and nutrition science, from building soil to creating sumptuous salads. Two years ago, a new UCCE community education specialist was assigned to the project, Rosalinda Ruiz. A native Spanish speaker and a mother herself, Ruiz quickly developed close relationships with the promotoras.

“She's not just their teacher. They look to her as a mentor and a friend,” said Jaci Westbrook, CalFresh Healthy Living, UC Community Education Supervisor for Stanislaus and Merced counties.

Ruiz is also a certified UC Master Gardener, having completed rigorous coursework in sustainable food gardening, pest management, irrigation practices and soil health. She realized the TWIGS curriculum would reach more students if she taught the promotoras how to implement the lessons at school sites.

“This empowered the promotoras to gain knowledge and gave them a different purpose,” Westbrook said. “They don't need to rely on others to offer activities. Working in pairs or small groups, they are reaching 100 to 135 elementary school students themselves.”

Planting day at the Ceres school farm.

Ruiz marvels at the many benefits of food gardening.

“Learning about gardening is the best thing families can do to teach their kids about healthy foods,” Ruiz said. “To grow your own food is a way to get fresh, nutritious food in your home. When kids see the fruit and vegetables growing and they're part of it, they are more willing to try it out.”

During the COVID-19 pandemic, promotoras instruction continued online using Zoom, which was completely new to them, and with WhatsApp, a familiar platform for promotoras to communicate among themselves.

The students are also getting virtual instruction. Promotoras have become proficient at Zoom and are offering simple garden lessons. Socially distanced in-person gardening lessons are also resuming to give children hands-on experience growing their own food.

Jobseekers get fresh start with JobTrain, CalFresh Healthy Living, UC

Elaine Silver, holding a cabbage from her garden, teaches JobTrain participants how to eat healthy on a limited budget.

Jailene Mendoza is excited to start her new job as a medical assistant in sports medicine in Palo Alto, a job she landed after completing training with JobTrain. 

After her job ended at the Housing Office at California State University, Stanislaus,Mendoza opted for training to help her move into a career that offers self-sufficiency. JobTrain provides career training in fields such as medical assistant, culinary arts, certified nursing assistant, carpentry, building maintenance, IT support and services.

For the past eight years, CalFresh Healthy Living, UC Cooperative Extension has partnered with the Menlo Park-based nonprofit to provide nutrition classes to unemployed residents of San Mateo County.

“These valuable life skills complement the vocational training they receive at JobTrain,” said Elaine Silver, nutrition educator for CalFresh Healthy Living, UCCE in San Mateo and San Francisco counties.

Based on 2018 SNAP-Education figures, 59% of all San Mateo County adults are obese or overweight and an estimated 68,000 county residents are food insecure. To address these health concerns among JobTrain students, CalFresh Healthy Living, UCCE delivers a course called “Plan, Shop, Save and Cook.” 

In these lessons, JobTrain students learn about MyPlate, shopping on a budget, preparing healthy meals and snacks for families, reading food labels, and the importance of physical activity.

Silver encourages reading product labels to choose the most nutritious foods. Shoppers may be able to spend less on a generic brand of a similar product.

“CalFresh Healthy Living, University of California Cooperative Extension courses taught me and provided me with many resources,” said Mendoza, who took the course in the summer of 2020. “I am constantly using the eatfresh.org website for recipes. A handout that has really helped me is the "Eating Better on a Budget." I refer back to this because I have caught myself buying more than what is needed and it ends up going to waste.”

“I also like to watch what I eat because I have the BIGGEST sweet tooth and MyPlate has helped me out with that. I make sure I have my grains, fruits, vegetables and protein before I even consider having any type of sweets.” 

Mendoza said she shared the "Eating Better on a Budget” tips with her family so they can reduce food waste.

In past years, Silver delivered the lessons in person, but switched to Zoom during COVID-19 stay-at-home orders to allow JobTrain students to continue building these important life skills.  

Since October 2020, 128 JobTrain students have taken Silver's virtual Plan, Shop, Save and Cook lessons. The San Mateo County residents improved their skills in planning meals, comparing unit prices, shopping with a list, considering healthy food choices when feeding their families, and using nutrition facts labels, according to a survey conducted after the course.

“I started cooking healthier meals for my family, including veggies,” wrote one survey respondent.

Overall, 88% of the students reported improvements ranging from 43% comparing unit prices more often to 60% using nutrition facts more often. In addition, 28% of participants reported running out of food less often before the end of the month – suggesting they were more food secure after taking the course.

“Some of the changes I've made is that I now look at the unit price, just to make sure I am getting my money's worth,” wrote another student. “Also, I have started taking a grocery list with me so that I can make sure I can stay in budget and not buy things that I do not need.”

Planning meals in advance and making a shopping list help save money and reduce food waste, said Silver.

Asked about the impact these virtual classes have had on students' lives, the feedback from JobTrain instructors has been overwhelmingly positive.

“Students look forward to these classes each week, and I love to see how excited they get when they learn about new ways to incorporate healthy practices into their everyday lives,” said Emily Phillips, JobTrain culinary arts instructor, who noted Silver's food safety lessons reinforce training that she teaches people learning food preparation.

Silver also encourages JobTrain students to be physically active and to take advantage of free park passes offered by San Mateo County Public Health through their Park Rx Program. These free park passes incentivize families to spend time in nature to improve their health and well-being.  

“Elaine's workshop has been very beneficial for the students at JobTrain. They utilize her suggestions on nutrition, saving techniques for food and applying healthy living for the student and their families,” said Xavier Gabut, who teaches nursing. “Elaine's workshops are relevant for my students, who will be entering the healthcare field, taking care of and educating patients on health.”

Mendoza, who earned a bachelor's degree in psychology from CSU Stanislaus, has returned to school. While working as a medical assistant in sports medicine, she will be completing her prerequisites for a degree in nursing.  

Elders need food and family for the holidays

Even in non-pandemic times, elderly community members face food insecurity and isolation. UC Cooperative Extension trains senior ambassadors, like the woman in red, to encourage neighbors to join activities like this 2018 class on growing food in gardening containers. Photo by Evett Kilmartin

In the U.S., the holiday season of Thanksgiving, Hanukkah, Christmas, Kwanzaa, and New Year seems to be a nonstop race to the end of the year. Gathering to exchange gifts and eat special food and bountiful meals are common ways we celebrate. But the new ‘Grinch' of the season, COVID-19, prevents us from gathering with elders and other people outside of our households.

“We've asked the most vulnerable in our culture to shelter, and now they are the most isolated and most in need of seeing people,” said Kirsten Bibbins-Domingo, chair of the Department of Epidemiology and Biostatistics at UC San Francisco. 

Historically, elders in many cultures have special places in the hearts of families during the holiday period of thanks, well-wishing, giving and remembering.

Elders play a major role in passing on oral family history and showing how to prepare cultural or traditional family foods, favorite recipes and other novelties handed down from one generation to the next. In contemporary society, extended-family households are rare so millions of seniors are living alone. Some elders have the financial capability and support systems to enjoy fulfilling experiences during the holidays, as much as the pandemic allows. Others will spend time lacking the basics — food, warmth and conversation.

The Centers for Disease Control and Prevention (CDC) published some considerations with tips to prevent the spread of COVID-19 throughout the season – stay home and avoid unnecessary travel. The best way to help keep friends and loved ones safe is to celebrate at home with immediate household members or connect virtually.

Seeing someone nourishes the soul

In his spare time, Max Fairbee volunteers to deliver food to elderly Alameda County residents. "I think that seeing someone actually means more to them than the food itself,” he said.

UC Cooperative Extension collaborates with local public and private community-based organizations and groups to serve senior residents.

As charter member of the Alameda County Community Nutrition Action Partnership (CNAP), inaugurated in 2006, UC Cooperative Extension coordinates with the Alameda County Health Department, Area Agency on Aging, Alameda County Social Services Agency, Alameda County Department of Education, Alameda County Food Bank and others.

During the pandemic, CalFresh Healthy Living, UC supervisor Tuline Baykal and community educators Max Fairbee and Leticia Christian continue to provide nutrition information to community members, inserting into food bags recipes, nutrition information and exercises that can be done at home. Max Fairbee, CalFresh Healthy Living, UC educator has also volunteered to deliver food bags to residents at a senior housing site.

CalFresh Healthy Living, UC educators add recipes and other information to food bags for seniors.

“The food bags were hefty in the beginning, but are smaller now with less items available at the Food Bank,” observed Fairbee. “Still, they usually get some fresh produce, some canned fruit or veggies, bread, potatoes, onions, eggs (sometimes) and meat (sometimes). Spectrum Community Services also has provided emergency relief food boxes which contain non-perishable items (including canned tuna) generally once a month.”

The food bags are delivered without contact with the elders.

“We knock or ring the doorbell, announce we are dropping off food and leave it in a safe spot near their door for them,” he explained. “The seniors stay inside their homes, but they are happy and so grateful to see the volunteers and staff. I think that seeing someone actually means more to them than the food itself.”

Food and family top the holiday wish list of vulnerable seniors

A senior learns container gardening to grow her own food. Elders who have limited mobility would appreciate offers of assistance. Photo by Evett Kilmartin

In November 2020, CalFresh Healthy Living UC educators asked low-income housing site coordinators and center directors what seniors in their complexes and centers would appreciate most for the holiday season.

Their desires are very basic to daily living. The seniors suggested the following:

COVID-19 prevention: Hand sanitizer, gloves

Food: A traditional holiday meal, Safeway gift cards; fresh produce, vegetarian meal, pumpkin pie

Celebration: cookie box, fruit box, dried fruit box, nuts.

Family: Having immediate or extended family visit

Clothing: Warm blankets and warm clothing

How can we honor and assist seniors?

Before coronavirus constraints, UC Cooperative Extension nutrition, family and consumer sciences advisor Mary Blackburn, left, held classes for senior residents and awarded certificates recognizing those who completed the program.

Consider sending meaningful holiday messages to seniors. Let the seniors in your community know it is to them we owe our lives, our survival, our respect and our gratitude. 

Families and friends: Call elders living alone to ask about their well-being. Having a conversation with them in person – while standing outside their door, distanced and wearing your mask – helps keep them connected. Offer to assist them, using all COVID-19 precautions. Make time to shop for them to ensure they have their medicine and food that is safe and healthful, in small portions for one or two people, and easy to prepare or heat. See that their refrigerator is clean, set at the right temperature, and free of outdated food. They may need help putting out the garbage, cleaning and sanitizing the kitchen, and doing laundry. Let them know you are someone to call if they need immediate help.

Caregiving: Caring is the operative word. Treat seniors with patience, respect and understanding. Let them know they are worthy of the care you give. 

With the COVID-19 constraints, underserved and vulnerable groups are facing an even greater crisis, especially with access to health services, housing, food and financial support. This holiday season and throughout the year, I encourage you to reach out to our elders. If you don't have money to spare, you can give emotional gifts. Your attention, conversation and compassion will be appreciated. 

When COVID-19 restrictions ease, UC Cooperative Extension will resume educational activities where elders can socialize and be recognized when they participate in gardening, nutrition, physical activity and safe food handling classes. We have seen success in training elders as “wellness ambassadors” to encourage their neighbors to join our activities to address isolation and communication issues.

Leticia Christian used to lead physical activities for senior residents of Oakland's Fruitvale district, which is an underserved community. The classes offered seniors an opportunity to socialize as well as exercise.

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