UC Food Blog
In a new series starting today, UC ANR features a sampling of our academics whose work exemplifies the public value UC ANR brings to California.
UC Cooperative Extension nutrition, family and consumer sciences advisor Deepa Srivastava arrived in the San Joaquin Valley in 2017 to conduct a research and education program that makes children and families healthier in Tulare and Kings counties.
Srivastava joined Cooperative Extension with diverse experience in obesity prevention research and program implementation and evaluation. Her job combines extension, research, university and public service to promote healthy living among families and children in low-income communities.
“I could hardly believe how well this job fit my interests, skills and education,” she said. “I have been involved in research and implementation and evaluation of nutrition education programs in the Department of Nutrition at the University of Nebraska-Lincoln. The UCCE position is ideal.”
Born in India, Srivastava immigrated to the United States after completing undergraduate and graduate degrees in her home state of Allahabad. She also earned a master's degree at North Dakota State University before moving to Nebraska, where she earned a Ph.D. in human sciences, with specialization in child, youth and family studies. After completing her doctorate degree at the University of Nebraska-Lincoln, Srivastava also worked as a project lead for the Ecological Approach to (EAT) Family Style project.
“My educational background and diverse experience prepared me to be a professional in the field of childhood obesity prevention and nutrition education,” Srivastava said.
Srivastava manages two federally funded nutrition programs for low income residents of Tulare and Kings counties. The CalFresh Healthy Living program presents information on food safety, food resource management, gardening, physical activity and youth engagement. Educators reach out to elementary schools to help develop school wellness policies and make lunchroom changes that steer children toward making nutritious food choices.
The second program, the Expanded Food and Nutrition Education Program, presents a series of classes to low-income families at community centers, schools and other service centers. The classes help participants stretch their food dollars, select and prepare healthy foods and take part in physical activity.
To shape her research program in Tulare and Kings counties, Srivastava conducted a needs assessment study to understand nutrition practices in early childhood education settings. Tulare and Kings counties are among the counties in the state with high levels of obesity and food insecurity.
Following her needs assessment, Srivastava concluded a successful pilot focused on preschoolers in Kings County. She and her nutrition team in Kings County, in partnership with the Department of Hospitality Management at West Hills Community College-Lemoore and preschools located at the college campus, implemented a collaborative nutrition education program to help preschoolers learn about healthy eating.
Srivastava is conducting further research to assess program sustainability and community engagement efforts, including how nutrition education offered by UCCE in Tulare and Kings counties motivates children and families to improve their knowledge, attitude, skills and behavior. Her research aims to understand the influences on children's eating and physical activity practices.
Srivastava is actively involved in obesity prevention initiatives within UC ANR and at the local, statewide and national level. Working with local community partners, she and her team have already introduced a number of change initiatives in Tulare and Kings counties to promote healthy lifestyles across lifespan, such as establishing new school gardens, youth engagement projects, healthy youth farmer's market and physical activity such as walking clubs and dance exercise classes.
“Our team is supported by experts from the University of California who are on the cutting-edge of the latest research and curriculum design,” Srivastava said.
Srivastava and her team were recognized at the National Extension Association for Family & Consumer Sciences conference in Hershey, Penn., in October 2019, where they won two SNAP-Ed/EFNEP awards: third-place at the national level and first place for the Western region.
“I am proud of my team's passion and hard work,” she said. “Our nutrition education programs have meaningful private and public values that promote healthy people and communities.”
For the first time since the 1980s, University of California, Davis, researchers have released new varieties of wine grapes. The five new varieties, three red and two white, are highly resistant to Pierce's disease, which costs California grape growers more than $100 million a year. The new, traditionally bred varieties also produce high-quality fruit and wine.
“People that have tasted the wine made from these varieties are extremely excited,” said Andrew Walker, geneticist and professor of viticulture and enology at UC Davis, who developed the new Pierce's disease-resistant varieties. “They are impressed that they're resistant, but also that they make good wine.”
Pierce's disease a growing threat
Pierce's disease is caused by a bacterium spread by a group of insects called sharpshooters. It causes grapevine leaves to yellow or “scorch” and drop from the vine. The grape clusters also dehydrate, and infected vines soon die. While the disease has been around since the beginning of wine grape production in California, concerns have escalated with the arrival of the nonnative glassy-winged sharpshooter, which has the potential to spread the disease more rapidly. Pierce's disease occurs most often near rivers and creeks, and around urban and rural landscaping where sharpshooter populations reside.
Pierce's disease also threatens wine grapes in the southeastern U.S. Rising temperatures from climate change could increase the spread of the disease, which is thought to be limited by cold winters. Growers in the Southeast can usually only grow Pierce's disease resistant varieties that don't have the same wine quality as the European winegrape species, Vitis vinifera, which is typically grown in California.
New varieties more sustainable
To create the new varieties, Walker crossed a grapevine species from the southwestern U.S. and northern Mexico, Vitis arizonica, which carries a single dominant gene for resistance to Pierce's disease and was used to cross back to Vitis vinifera over four to five generations. It's taken about 20 years to develop the five patent-pending selections that are now being released.
“These varieties will hopefully make viticulture much more sustainable and provide a high-quality wine that the industry will welcome,” said Walker. “So far there has not been tremendous interest in new wine grape varieties, but climate change may encourage growers to reconsider wine grape breeding as we work to address future climates and diseases.”
Winemaker Adam Tolmach, owner of The Ojai Vineyard in Ojai, planted four of the new varieties as part of a 1.2-acre experimental field trial. The trial was on the same plot of land where Pierce's disease wiped out his grapes in 1995. The vineyard then and now is organic, so spraying insecticides to fight the disease spread wasn't an option.
“I wasn't interested in planting in that plot again until I heard about these new Pierce's disease-resistant grape varietals,” said Tolmach. “This year was the first harvest. We've just begun to evaluate the wine but I'm very encouraged.”
Five varieties to suit every taste
The five new varieties of wines were evaluated by sensory tasting panels. Tasters included leading industry winemakers and enologists in prominent wine-growing regions of California and Texas as well as regions in the southeastern U.S.
“What I think is exciting is that they're stand-alone varieties independent of whether they have Pierce's disease resistance,” said Doug Fletcher, former vice president of winemaking for Terlato Family Wine Group.
The three new red varieties are camminare noir, paseante noir and errante noir.
Camminare noir has characteristics of both cabernet sauvignon and petite sirah. The selection has ranked highly at numerous tastings of fruit grown in both Napa and Davis. Tasting comments: dark-red purple color, bright red fruit, raspberry, cherry, ripe, tannic, elegant rather than dense. The variety is 50% petite sirah and 25% cabernet sauvignon.
Paseante noir is similar to zinfandel. It has also been ranked highly at tastings. Tasting comments: medium dark red with purple; berry pie, cassis, black olive, herbal, dried hay, coffee, vegetal like cabernet sauvignon, licorice, round, moderate tannins, soft finish. The variety is 50% zinfandel, 25% petite sirah and 12.5% cabernet sauvignon.
Errante noir is a red winegrape most similar to a cabernet sauvignon and has great blending potential. Tasting comments: dark-red purple color; complex fruit with herbs and earth, plum, big wine, dense, rich middle, tannic yet balanced. The variety is 50% sylvaner and 12.5% each of cabernet sauvignon, carignane and chardonnay.
The two new white grape varieties are ambulo blanc and caminante blanc.
Ambulo blanc is similar to sauvignon blanc and has been tested in Temecula, Sonoma and along the Napa River. Tasting comments: light straw to clear color, citrus, lime, tropical, gooseberry, golden delicious apple flavors; bright fruit, slightly bitter, textured. The variety is 62.5% cabernet sauvignon, 12.5% carignane and 12.5% chardonnay.
Caminante blanc has characteristics of sauvignon blanc and chardonnay. Wines have been made from Davis fruit and ranked well. Field trials are underway at Pierce's disease hot spots in Ojai and Napa. Tasting comments: light straw-gold color, apple-melon, lychee, floral aromas, pineapple, green apple, juicy, harmonious, well-balanced. The variety is 62.5% cabernet sauvignon, 12.5% chardonnay and 12.5% carignane.
These five varieties are ready for patenting and release. There will be limited amounts of plant material available for propagation in 2020 as only a few of the grape nurseries participated in a pre-release multiplication program. Much more will be available in 2021. The Pierce's disease resistance breeding program continues, and more selections are approaching release.
New studies provide details about trellis type, planting density, cost and potential benefit of vineyard mechanization
The studies estimate the cost of establishing a vineyard and producing wine grapes, focusing on four wine grape varieties – Cabernet Sauvignon, Chardonnay, Rubired and Colombard.
“Those studies take into consideration mechanical pruning, leafing, shoot thinning, and harvest on a typical wine grape vineyard with the average production level for this region,” said George Zhuang, UC Cooperative Extension viticulture advisor in Fresno County.
“With farming labor becoming more scarce and expensive, growers will opt to transition into more mechanization,” Zhuang said. “These studies provide detailed information about the trellis type, planting density, cost and potential benefit of vineyard mechanization. Based on these studies, fully implemented mechanization reduces the production cost from $3,000 to $2,500 per acre and that represents 17% cost reduction. This information will ultimately help growers to guide their production practices to more profitable and competitive ways under the new era of farming labor.”
“The investment to purchase and own equipment can be high,” Zhuang said. “Fortunately, it is easy to find a contractor in this region to perform certain vineyard tasks, if the initial investment to purchase equipment is prohibitive.”
Numerous studies, including UC studies, have confirmed the benefits of vineyard mechanization to grape and wine quality with lower production costs.
“It is a win-win-win situation,” Zhuang said. “Growers can improve their farming margins, wineries and juice processing plants can get reliable and higher quality grapes and juice from farms, and average consumers can enjoy better wine and more healthy grape products at an affordable price.”
The studies are based on 200-acre farms with the vineyard established on 40 acres using two types of trellis systems – quadrilateral cordon system and bilateral cordon system. In addition to regular grape production expenses – such as irrigation, fertilization and pest control – the researchers broke out the differences between machinery costs and hand labor hours required for thinning, pruning and harvesting for each variety.The prices for labor, materials, equipment and custom services are based on October 2019 figures.
Input and reviews were provided by UC Cooperative Extension farm advisors, specialists, grower cooperators and other agricultural associates. The authors describe the assumptions used to identify current costs for wine grape establishment and production, material inputs, cash and non-cash overhead. A ranging analysis table shows profits over a range of prices and yields.
The new studies are:
- 2019 - Sample Costs to Establish and Produce Winegrapes in the Southern San Joaquin Valley – Chardonnay Variety
- 2019 - Sample Costs to Establish and Produce Winegrapes in the Southern San Joaquin Valley –Cabernet Sauvignon Variety
- 2019 - Sample Costs to Establish and Produce Winegrapes in the Southern San Joaquin Valley – Rubired Variety
- 2019 - Sample Costs to Establish and Produce Winegrapes in the Southern San Joaquin Valley – Colombard Variety
All four winegrape studies can be downloaded from the UC Davis Department of Agricultural and Resource Economics website at http://coststudies.ucdavis.edu. Sample cost of production studies for many other commodities are also available on the website.
For information about local grape production, contact George Zhuang, UCCE viticulture advisor for Fresno County, at firstname.lastname@example.org; UCCE viticulture specialist Matt Fidelibus at email@example.com; UCCE viticulture specialist Kaan Kurtural at firstname.lastname@example.org; Karl Lund, UCCE viticulture advisor for Madera, Merced and Mariposa counties, at email@example.com; or Gabriel Torres, UCCE viticulture advisor for Kings and Tulare counties, at firstname.lastname@example.org.
The 2010 Healthy Hunger-Free Kids Act (HHFKA) marked the first major update to school meal guidelines across America in 15 years. Prior to HHFKA, there were no restrictions on salt, fat content in milk, or trans fats. Fruits and vegetables were grouped together, and there were no guidelines about increasing variety. In addition, snacks (i.e., competitive foods, since they compete with the school meal program) were not regulated, which meant that students could purchase junk food like candy bars and soda through vending machines right next to the cafeteria.
At the same time, childhood obesity rates were continuing to increase, along with risk factors associated with chronic diseases like heart disease and diabetes. With the updated regulations for the National School Lunch and School Breakfast Programs, millions of students across the U.S. got access to healthier meals, more in line with the Dietary Guidelines for Americans.
But what about the other foods that are available to kids during the school day? If a cookie is being sold right next to the school lunch and at a lower price, why not just buy the cookie? Or if you know your class is getting brownies from the teacher later, why get lunch at all?
The answer: New standards under the HHFKA set regulations on snacks that can be sold during the school day. Now called Smart Snacks, these food items must align with federal nutrition standards. Such standards include being at least:
- 50% whole grain OR
- having the first ingredient on the nutrition label be a fruit, vegetable, dairy product or protein food OR
- being a combination food where at least ¼ cup of the snack is a fruit or vegetable.
Many granola bars, popcorn, crackers and even treats like brownies can be a Smart Snack. Whole fruit, vegetables and frozen fruit in water or 100% fruit juice are always Smart Snacks. These standards are also required for fundraisers and events that occur during the school day, basically anytime money is exchanged for food at school. Surprising to most, the school day (for the purpose of school food regulations) actually starts at midnight before and ends 30 minutes after the last class of the day.
What makes a snack 'smart'?
Don't worry, it's not just kale chips and broccoli stalks (although kale chips and broccoli are awesome!). There are a variety of Smart Snacks that fit the taste preferences for every age range.
As parents, community partners, school boosters and school staff, we all have a role in ensuring our youth have access to healthier snacks at school. It's also the law if your school participates in the federal school meal program. To find out if the food you want to sell or give out to kids makes the smart snack grade, you can check out the Alliance for a Healthier Generation Smart Snack online calculator, where you can enter in the nutrition information from the food label. Also, large online retailers like Costco and Amazon have Smart Snacks stores where you can browse and purchase a variety of compliant Smart Snacks. These standards have been around for some time now, but many people are still unfamiliar with them or don't understand their importance.
While Smart Snacks rules only apply to food that is sold to students during the school day, other policies - like your district's Local School Wellness Policy – may govern what can be provided to students on campus through rewards and incentives or at school celebrations. So, while there are regulations about what can be sold at school during the school day, why stop there? Why not make your after school fundraiser or snack shack healthy? Why not use smart snacks instead of sugary treats? Or even better, use non-food incentives like a birthday book instead of the same sugary cupcakes that come around each time there is a birthday. Instead of selling soda for $1 with the hotdog meal at the school carnival, try sparkling water or a hydration station with fruit infused water and a prize if you bring your own reusable water bottle. Just like clothes and movies, healthy and sustainable foods are becoming more trendy and lucrative for your fundraiser!
Overall, Smart Snacks are an important complement to the national school meal program and can be a great way to help students maintain growth and success in the classroom while also helping to maintain healthy lifestyles throughout life. Let your PTA and school partners know with this new infographic.
“Optimizing Yield and Quality in Irrigated Forages” will be the focus of discussion at the 2019 Western Alfalfa & Forage Symposium. More than 550 people are registered for the symposium, which will be held Nov. 19-21 at the Grand Sierra Hotel in Reno, Nev.
Irrigation management, forage quality and pest management are among the many topics that will be covered at the symposium. The comprehensive program features 62 speakers, 70 exhibitors, student poster sessions and an auction.
This program was organized by Cooperative Extension specialists and farmers from 11 states – Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming.
This year we feature several important areas of emphasis: Irrigation Workshop, Pest Management, Systems, Alternative Forages, and a ‘Forage Quality Mini-Symposium' on the last day.
Here are some of the agenda highlights:
Day One – Tuesday, Nov. 19, FORAGE IRRIGATION WORKSHOP: This one-day workshop provides many of the basics of irrigation management for forage crops.
- Importance of Irrigation Management in Forage Crops
- What is ET and How to Measure?
- Soil Moisture Monitoring
- Irrigation Scheduling
- Fertigation and Use of Degraded Waters
- Salinity Management
- Deficit Irrigation of Alfalfa
- Analysis of Sprinkler Systems
- LEPA/LESA and Mobile Drip
- Variable Rate Irrigation
- Surface Irrigation Systems Design
- Automation of Furrow and Flood Irrigation
- Comparing Systems on-Farm
- Drip Irrigation Systems in Alfalfa
- Management of SDI on-Farm
- Innovations from Companies in Irrigation Management
5 p.m.-7 p.m. SYMPOSIUM WELCOME RECEPTION Hors D'oeuvres and No Host Cocktails, Exhibits Open, Posters on Display
Day Two – Wednesday, Nov. 20, MAIN SESSION: ECONOMICS, WATER, PEST MANAGEMENT, FORAGE SYSTEMS & ALTERNATIVE FORAGES: This features an array of topics on the environment, economic trends, pest management and alternative forages.
- Climate Change and Forage Production in Western States
- Alfalfa Rotation Studies with Alfalfa, Small Grains, Corn
- Benefits of Alfalfa in Rotations
- Snake River Aquifer Groundwater Recharge
- Alfalfa for Groundwater Recharge
- Hay Industry Trends
- Western Dairy Trends
- World Trends in Exports
- Key Issues for Hay Exporters
SYMPOSIUM BANQUET LUNCH
- Control of Rodents Using Drones
- Managing Beldings Ground Squirrels
- Managing Weeds in Alfalfa
- Glyphosate Injury in Roundup Ready Alfalfa
- Clover Rood Cuculio
- Insect Resistance in Alfalfa Weevil
- IPM Program for Alfalfa Winter Pests in Deserts
- Sugarcane Aphid and Control Strategies
- Grazing Techniques on 7.2 Million Acres of alfalfa in Argentina
- Simulated Grazing Timing of Annual Cereals
- Optimizing Management of Small grain Forages
- Management of N in Timothy
- Tef as a Forage Crop
- Rhodes Grass as an Alternative Forage
- Corn and Sorghum Forages: Water and N Implications
- Utilization of Sugarbeet as a Forage
5 p.m.-7 p.m. SYMPOSIUM RECEPTION Hors D'oeuvres and No Host Cocktails, Exhibits Open, Posters on Display. 6 p.m. CALIFORNIA ALFALFA & FORAGE ASSOCIATION LIVE AUCTION
Day Three – Thursday, Nov. 21, MAIN SESSION-FORAGE QUALITY MINI-SYMPOSIUM This is an event co-sponsored by the NIRS consortium and the Forage Testing Association
- Linkage of Testing with Markets
- Horse Nutritional Requirements and Testing
- Importance of Fiber and Fiber Digestibility
- Representing the Value of Energy, Protein, and Fiber in Feedstuffs
- Key Hay Sampling Protocols
- How to Choose a High-Quality Testing Lab
- Standardization of Forage Testing and NFTA Certification
- Misconceptions of NIRS Analysis
- Multi-State Analysis of Forage Quality
- Importance of Dry Matter Analysis
- Future of Forage Testing
3 p.m. ADJOURN SYMPOSIUM
See the complete program at https://alfalfa.ucdavis.edu. Register for the program, hotel and exhibitors at http://calhay.org/symposium. Continuing education units will be provided (24 units CCA, 3 units PCA).