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Report: Making homes more resistant to wildfire can be affordable

Priorities include removing objects within five feet of a house, upgrading vents

Wildfire losses cost taxpayers and communities hundreds of billions of dollars each year, and preparing communities before a disaster occurs is the best way to avoid damage to homes and neighborhoods. Retrofitting existing homes can make communities safer while avoiding billions in disaster costs.

As Californians learn to live with wildfire, scientists encourage improving the structure and design of houses and other buildings to help them survive wildfire. A new report shows that even inexpensive changes can increase wildfire resistance.

“Retrofitting a Home for Wildfire Resistance” suggests that some of the most effective strategies to reduce the vulnerability of homes and neighborhoods to wildfire can be done affordably.

“This report is a practical tool that helps evaluate the relative costs and benefits of fire-hardening retrofits,” said Yana Valachovic, a University of California Cooperative Extension forest advisor, who reviewed the study. “These retrofits can substantially improve the odds that a home or building will withstand wildfire exposures to embers, radiant heat or flame contact.”

The report is co-authored by Kimiko Barrett, wildfire research and policy analyst for Headwaters Economics, a non-partisan research organization based in Bozeman, Montana, and Stephen L. Quarles, UC Cooperative Extension advisor emeritus, who has studied the vulnerability of the built environment to wildfire exposures and potential mitigation strategies.

In partnership with California's Department of Forestry and Fire Protection, or CAL FIRE, Barrett and Quarles examined the costs for improving the structure and design of existing homes to increase their wildfire resistance.

“This tool can also help homeowners build a budget and prioritize tasks that often feel overwhelming,” Valachovic said. “Everyone should prioritize removing combustible vegetation, mulch, and stored materials within the first five feet of a structure and upgrading vents to resist embers.”

Simple actions can reduce a home's vulnerability to wildfire

The report's conclusions are derived from a detailed examination of the latest available science on mitigation strategies and construction costs. The authors identified costs for retrofitting structures to meet and exceed California's building code (Chapter 7A) for wildfire resistance, but the general principles and conclusions can be applied in other states, adjusting for local economic and supply conditions.

For a typical 2,000-square-foot home in California, retrofitting costs can range from $2,000 to upwards of $100,000 for the highest level of protection.

“When we looked at the latest building techniques and cost data, we found some effective retrofitting strategies can be done for between $2,000 to $10,000,” said Barrett. “While the highest level of protection can cost more, it is often not necessary. Simple actions such as removing flammable materials from near the home and removing debris from the roof can be done at little to no cost.”

The authors also incorporated effective mitigation strategies that could reduce risk without requiring costly upgrades over the entire home, such as replacing siding only on the side of a home that is close to another building, such as neighbor's home or a detached garage, or replacing combustible deck boards next to the home with a noncombustible deck board or metal grate.

They also incorporated a systems approach, where the vulnerability of adjacent components are considered, and recommend steps such as placing noncombustible surfaces at the intersection between two components.

For example, Quarles said: “Adding a gutter cover and ensuring the adjacent edge of roof is not vulnerable by incorporating a metal drip edge and, if necessary, a noncombustible bird stop at the edge of the roof. Or, replacing a combustible deck board next to the house and, if necessary, adding metal flashing at the base of the exterior wall.”

Cost estimates in the report include those for upgrading a home's exterior walls, roof, deck, windows, doors, eaves, gutters and near-home landscaping – all areas likely to be exposed to embers, direct flames and radiant heat.

“The graphics detailing specific elements of the retrofitting process are very useful,” Valachovic said.

Charts, architectural renderings and a detailed appendix of cost estimates provide a basis for a general understanding of the methods and budgets that homeowners might consider when retrofitting their home for wildfire resistance.

Retrofitting for wildfire can make communities safer

Contractors and others seeking information about building wildfire-resistant homes can gain valuable insights from this analysis, along with retrofit costs generated by the California Wildfire Mitigation Program.

“This analysis demonstrates that investing in wildfire-resistant retrofitting for homes is a cost-effective strategy to protect communities that could save billions in disaster costs,” said Barrett. “As more people live in fire-prone areas, we must also take a closer look at retrofitting homes to be stronger and more durable.”

While the authors hope Californians use the information to protect their homes, people who work in construction, development, design and policy also can use the information to show that retrofitting homes for wildfire resistance is an effective way to protect communities.

This 58-page report received funding from CAL FIRE and the U.S. Forest Service and can be downloaded for free at https://headwaterseconomics.org/wp-content/uploads/2024/06/Wildfire_Retrofit_Report_20240624.pdf.

Barnes brings hometown knowledge to UCCE in Lake, Mendocino counties

New Cooperative Extension director has worked extensively with Native American communities, youth groups

Growing up in Upper Lake, along the “North Shore” of Clear Lake, Matthew Barnes lived near several of the Lake County region's seven federally recognized tribes. Although he counted several Native Americans among his diverse circle of childhood friends, and was very familiar with those communities, Barnes was nonetheless quite nervous when he was appointed in 2009 as the inaugural executive director of the Boys & Girls Club of the Pomo Nation.

Barnes – a non-Native of European and Filipino descent – vividly remembers the tribal administrator paying him a visit on one of his first days on the job. “He said, ‘Hey, you have two ears and one mouth, so listen twice as much as you speak and you'll be fine,'” Barnes recalled. “And that's definitely stuck with me.”

That approach is continuing to guide Barnes in his new role as University of California Cooperative Extension director for Lake and Mendocino counties. He will guide and support research, outreach and education activities to meet the area's agriculture, natural resources, and youth and community development needs.

Since starting in May, Barnes has been getting a crash course from UCCE advisors and staff on viticulture research, pest management practices, 4-H camps, and a host of other projects and programs – while also meeting with local communities on the region's most pressing challenges.

“What I've been doing – and will continue to do – is just to listen and learn, and when I can add value to a conversation or project, then I'll do that,” Barnes said. “But leadership to me starts with the relationships we build – with our staff and with the community.”

Bringing a range of experiences in youth programs, social services

One area in which Barnes will certainly add value is developing youth and community programs. During his time with Boys & Girls Club of the Pomo Nation, it was one of only three Boys & Girls Clubs established on tribal land in California. In that role, Barnes faced the unique challenge of integrating the Boys & Girls Club curriculum into a community for which it was not originally designed.

By adapting the curriculum to include culturally relevant topics, Barnes transformed the program into a model that eventually aided in the creation of a Native American-focused branch, Boys & Girls Clubs of America Native Services.

“This initiative now serves as a national standard for Boys & Girls Clubs on tribal lands,” Barnes said.

He later became a director of California Tribal TANF (Temporary Assistance for Needy Families), a direct cash assistance and supportive services program for Native American families in 17 counties across the state.

During his decade of TANF work, Barnes launched career development programs, alcohol and other drug counseling programs, and cultural revitalization initiatives. Some of the programs are still running and serving communities to this day.

“The trick is making those programs something that participants can see the value in,” Barnes explained. “And to do that, you go into the communities and talk to people and listen to what they need – instead of you telling them what they need.”

Barnes' experience partnering with Native American communities is just one of the many strengths he will bring to UCCE and UC Agriculture and Natural Resources.

“We're very excited to have Matthew join the UC ANR family,” said Lynn Schmitt-McQuitty, UC ANR's director of County Cooperative Extension. “His personal knowledge of Lake and Mendocino counties and his previous work with Indigenous populations will be a tremendous asset to extending and elevating our work.”

Immediately prior to joining UC ANR, Barnes served as director of Lake County's Upward Bound program, which helps students from three local high schools experience and prepare for higher education.

“Overall, what drives me personally is the opportunity to make an impact on communities, on youth, and on people in general through program development and management,” Barnes said.

Inspiring young people as a mentor

Barnes' passion for youth development – and the impetus for his bachelor's degree in social work from Cal Poly Humboldt – can be traced to his AmeriCorps experience while he was attending Mendocino College. For two years, he worked as a tutor for young people, in Lake County and then in Sonoma County, and saw firsthand the difference educators and mentors can make in their lives.

“You could say I kind of caught the bug – just seeing the light bulbs go on when you're helping a youth of that age,” Barnes said.

From there, Barnes took a position directing teen programs for the Boys and Girls Club of Healdsburg, where he began to fully appreciate the importance of trusted adults simply “being there” for young people as a listening ear for whatever they want to talk about.

Among the many teens Barnes worked with, “Rodrigo” was a middle schooler who was pegged by his school and community as someone who could “slip through the cracks.” Rodrigo was the last to go home at the end of each day, and Barnes would chat with him – answering his questions about life or just talking about a new rap album.

“I realized I was ‘that person' for him – that person outside his house, outside his school,” Barnes said.

Even after Barnes left the Boys and Girls Club, Rodrigo – bound for university – invited him to his high school graduation. Barnes said it is tremendously gratifying to know he had a “small role” in shaping the path for Rodrigo – and countless others.

“Their success is still theirs; it's not necessarily because of me,” Barnes added. “My job is to do what I can in the moment to hopefully plant some seeds that may sprout in the future.”

Settled in Middletown, not far from his hometown, where he and his wife are raising two children, Barnes is now positioned to help nurture a flourishing Lake County and resilient Mendocino County.

“I feel like my past experiences, both in life and my career, have prepared me for this,” Barnes said.

Paper highlights how climate change challenges, transforms agriculture

As the climate continues to change, the risks to farming are only going to increase.

That's the key takeaway from a recent paper published by a team that included UC Merced and UC Agriculture and Natural Resources researchers. The paper dives into what those challenges are, how farmers are working to address them and what should come next.

"Climate Smart Agriculture: Assessing Needs and Perceptions of California's Farmers" was first authored by Samuel Ikendi, academic coordinator, with Tapan Pathak, UC Cooperative Extension climate adaptation in agriculture specialist, as a corresponding author. Both are based at UC Merced. Pathak is also a project director of National Institute of Food and Agriculture-funded project "Multifaceted Pathways to Climate-Smart Agriculture through Participator Program Development and Delivery," which supported this study. The study appeared in the open access journal Frontiers in Sustainable Food Systems.

The needs assessment was designed to understand farmers' perceptions and experiences with climate change exposures; the risk management practices they currently use; and what tools and resources would assist them in making strategic decisions.

Of the farmers surveyed, roughly two-thirds agree climate change is occurring and requires action. Even more said they are interested in learning more about the impacts of climate change on the agricultural industry. Most respondents said they experience greater climate change impacts on their farms today compared with 10 years ago.

Farmers were very concerned with water-related issues, with those in the San Joaquin Valley, Central Coast and Inland Empire areas particularly worried about a reduction in the availability of groundwater. Increased drought severity was a very significant concern among farmers in the Inland Empire, Central Coast and Southern regions. Farmers in the North Coast and Southern regions were concerned about increased damage to crops due to wildfire.

Closely related were temperature-related issues, including crop damage due to extreme heat.

Those who farm vegetables were more concerned about water availability for irrigation, while fruit farmers were more concerned about increased crop/water stress and increased crop damage due to extreme heat.

Many respondents said they are implementing climate adaptation practices including managing water resources, maintaining soil health and making more use of renewable energy sources. They are seeking insurance and government help to pay for these adaptations and increase their agricultural resilience, the researchers wrote.

The farmers expressed interest in learning more about measures they might take to mitigate climate change. But they cited significant barriers to this work, including government regulations, high implementation cost, labor access/cost, access to water and the availability of money to pay for it.

"Climate change is significantly altering California's highly diverse agricultural landscape, posing challenges such as increased water stress, heat stress, and shifting growing seasons," Pathak said. "Climate-smart agriculture practices can alleviate some of those stresses."

But, he said, research and UC Cooperative Extension efforts only have value if they lead to enhanced climate-informed decision-making at the local level.

"Assessing their level of knowledge, perception and needs will help in tailoring research and extension activities that are most relevant to farmers on the ground," Pathak said. "Results from this study could also provide important policy insights on financial incentives and technical assistance."

 

New project aims to use farm waste to fuel bioeconomy

UC ANR to help create database, support technology for sustainable bioproducts and biofuels

In California's Northern San Joaquin Valley, crop leftovers such as almond shells, fruit peels and orchard trimmings can potentially be converted into sustainable bioproducts and biofuels – with the right technology. The philanthropy Schmidt Sciences' Virtual Institute on Feedstocks of the Future, which supports replacing fossil feedstocks with renewable biomass sources, has awarded new funding to a group investigating how to make better use of the diverse agricultural waste in the region.

“This is an important project for California as it quantifies the diverse ‘ingredients' in the North San Joaquin Valley available to fuel the emerging biomanufacturing industry in the state,” said Gabe Youtsey, chief innovation officer for the University of California Agriculture and Natural Resources. “This foundational work will kickstart a completely new innovation bioeconomy in the Central Valley that will create new high-paying jobs for our communities and support a resilient food and agriculture industry through circular biomanufacturing.”

Circular biomanufacturing is a process that uses waste streams as raw materials to create new products.

“Circular means taking waste streams from agriculture such as almond shells or grape pomace, forest waste or food processing waste and using that material as the ‘feedstock' in a fermentation tank to create new bioproducts,” Youtsey explained.

The group, “Building the Circular Bioeconomy in the North San Joaquin Valley” or BioCircular Valley, is co-led by the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), UC Berkeley, and BEAM Circular, with partners at UC Merced, UC Agriculture and Natural Resources, the Almond Board of California and USDA Agricultural Research Station in Albany.

“California has this incredible diversity of materials, but they aren't well understood – and this makes it difficult to know how to extract the most value out of them,” said Corinne Scown, a senior scientist at Berkeley Lab and UC Berkeley and one of the project leads. “We want to characterize them and make that information available so companies can more easily figure out which feedstock is a good match for them, and then use that agricultural residue to make everything from bio-based polymers and chemicals to sustainable materials and aviation fuels.”

One of the group's goals is to build a publicly accessible database and user-friendly map full of information about different feedstocks, the raw plant materials and biomass that can be broken down and used to make bioproducts. That includes where feedstocks are located, when they are available, how they are currently disposed of, how they perform in different bioreactors, how much sugar or lignin they contain, whether they can be processed with other feedstocks, their greenhouse gas footprint, the potential cost, and much more.

UC ANR's role is to collect data on available feedstocks from forest, agricultural and food processing byproducts, as well as municipal waste streams through sampling and observation.

“We will do this through the extensive knowledge and relationships we have with the California agriculture industry in the North San Joaquin Valley,” Youtsey said. “UC ANR will also support industry outreach as new ‘conversion' technologies are developed, to pilot them with California growers and processors.”

The project will also test ways to improve the flexibility of the conversion process, which breaks down feedstocks to prepare them to make bioproducts. Researchers will apply artificial intelligence to their lab-generated data to improve predictions of how feedstocks can be processed most efficiently or blended together. Being able to use the same technique on different (or mixed) kinds of plant matter would open up ways for companies to make bioproducts more easily.

“Our region has a fantastic combination of diverse and large-scale agricultural activities alongside manufacturing expertise, making this a great place to scale up bioeconomy innovation,” said Karen Warner, CEO of BEAM Circular. “This project will allow us to reduce barriers to using our region's abundant waste streams in more sustainable and valuable ways, so that we can create the products that people need with renewable inputs that are better for the planet.”

The project builds on ongoing efforts to establish biomanufacturing capabilities in the northern San Joaquin Valley, which includes San Joaquin, Stanislaus and Merced counties. Providing better data on how to convert the valley's millions of tons of agricultural waste into valuable products may spur biomanufacturing companies to build facilities nearby, minimizing how far the raw materials have to be moved and generating new jobs.

“This project is designed to benefit a region that has massive potential, but so far has been economically left behind, and to develop a new industry that can provide improvements in air quality, water quality and greenhouse gas emissions as well as significant opportunities in economic equity and the creation of new jobs,” said Blake Simmons, director of Berkeley Lab's Biological Systems and Engineering Division and the BioCircular Valley project lead.

“This kind of research started as basic science, and now we're bringing information and solutions to people who can use them. And the knowledge generated through this project will advance not only the ability of the NSJV to make use of its own regionally available future feedstocks, but will also accelerate the understanding of feedstocks relevant across California and across the U.S.”

The new funds for the project come from the Virtual Institute on Feedstocks of the Future, a partnership between Schmidt Sciences and the Foundation for Food & Agriculture that supports collaboration on research to transform biomass into alternative feedstocks for biomanufacturing. The award is one of five announced today, which total $47.3 million over five years. It is expected that the five teams will collaborate to share best practices and knowledge to boost the bioeconomy at the national level.

“We are grateful for Schmidt's generous support that will help deploy advanced technologies on the ground,” said Alicia Chang, interim president of Berkeley Lab Foundation. “The foundational research and expertise developed through work for the Department of Energy sets the stage for this team to apply their capabilities to bring jobs and lift the community and the economy in the Northern San Joaquin Valley.”

Almond crop yields threatened by disease new to California

Detection of fungus causing red leaf blotch spurs call for grower vigilance

Symptoms of red leaf blotch (RLB), a plant disease caused by the fungus Polystigma amygdalinum, have been observed for the first time in California across the Northern San Joaquin Valley.

Molecular DNA testing by the laboratory of Florent Trouillas, University of California Cooperative Extension fruit and nut crop pathology specialist, has detected P. amygdalinum. Pest identification was confirmed by the California Department of Food and Agriculture and U.S. Department of Agriculture.

The disease, named for the characteristic orange-to-dark red blotches that appear on infected leaves, is typically nonlethal for trees but has been a long-standing problem for almond-growing regions across the Mediterranean. Causing trees to lose their leaves prematurely, the fungal pathogen can significantly diminish crop yields in the current year and the next.

“It is one of the most severe diseases of almonds for Spain and the Middle East,” said Trouillas, an associate professor in the UC Davis Department of Plant Pathology. He recently co-authored an explanatory article on the UCCE San Joaquin Valley Trees and Vines blog.

With symptomatic trees seen in multiple orchards across Madera, Merced, San Joaquin and Stanislaus counties, Trouillas said RLB is already “somewhat widespread.”

“From the first observations so far, it seems like it affects some of the most-planted cultivars, like Nonpareil and Monterey,” he added. “We've observed it in a diversity of cultivars already.”

UC Cooperative Extension specialist urges taking preventive measures

According to Trouillas, RLB caused by P. amygdalinum is “highly specific” to almond trees, and generally only affects their leaves. Infection typically happens at petal fall, when small leaflets are first emerging and most susceptible to disease. After the pathogen's latent period of about 35 to 40 days, the first symptoms appear – small, pale-yellow spots on both sides of the leaves.

Those blotches become yellow-orange and then reddish-brown in the advanced stages of the disease during June and July. Now, with RLB symptoms becoming more prominent, Trouillas and UC Cooperative Extension advisors across the Central Valley have seen an uptick in calls.

“PCAs [pest control advisers] have been confused because they've never seen anything like this,” said Trouillas, noting that the yellow-orange-red blotches are symptoms unique to RLB and cannot be confused with other known almond diseases.

Applying fungicides after RLB symptoms appear is ineffective, Trouillas said. The best thing growers can do at this point is to report symptomatic trees to researchers so they can track the prevalence and distribution of the disease.

Growers who see signs of this new disease in their orchard should contact their local UC Cooperative Extension farm advisor.

Preventive measures are the best way to manage RLB, Trouillas said. He urges concerned growers to think ahead to next winter/spring and plan for fungicide applications at petal fall and – if rains persist – also at two weeks and five weeks after petal fall. Fortunately, those are the same three key timings for managing other diseases, like shot hole and almond anthracnose.

“Because RLB is something that is introduced and potentially aggressive, it will be important for growers to keep that in mind next year and be on schedule for next year's spraying program,” Trouillas said.

Additional information on RLB can be found at https://www.sjvtandv.com/blog/first-detection-of-red-leaf-blotch-a-new-disease-of-almond-in-california.

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