- Author: Saoimanu Sope
In late January, the University of California Nursery and Floriculture Alliance co-hosted the 62nd Western Region International Plant Propagators' Society (WR-IPPS) Annual Meeting in Temecula.
UCNFA, associated with the Nursery and Floriculture Workgroup of UC Agriculture and Natural Resources, is a statewide partnership of researchers and educators, growers, floriculture associations and allied industries. It serves the educational needs of California's agricultural industries that produce greenhouse crops and nursery products including vegetable seedlings, ornamentals, fruiting trees, vines and shrubs.
“Up until 2007 and before almonds and grapes became a big deal, nursery and floricultural products were the top crop commodity in the state,” said Loren Oki, specialist emeritus of Cooperative Extension at UC Davis and co-director of UCNFA. “Nurseries and floriculture are a $3.6 billion industry in California, but not many people know about it.”
Since its inception in 1951, IPPS has sought and shared plant production knowledge globally with an emphasis on nursery production. Oki has been a member of IPPS since the 1980s. His father, George, who owned and operated Oki Nursery, helped establish the Western Region in the 1960s, paving a path for Oki who served as president of WR-IPPS in the 1990s.
Although this year was the first that UCNFA co-hosted, Oki is confident that it won't be the last. “We're already planning a conference for the fall in conjunction with WR-IPPS. Since the target audience of UCNFA are growers, it just makes sense to partner with growers for these events,” Oki said.
This year's meeting involved 145 attendees, 29 exhibitors and 23 speakers and occurred over four days – two of which were dedicated to grower tours and the other two offering educational presentations in both English and Spanish, another first for WR-IPPS.
Gerry Spinelli, UC Cooperative Extension production horticulture advisor for San Diego County and member of UCNFA's administrative committee, was instrumental in coordinating the event. When he wasn't moderating sessions or facilitating Q&A, Spinelli was sharing his expertise on measuring pressure, distribution uniformity and improving irrigation management in English and Spanish.
“It's rewarding to see so much statewide interest in nurseries and floriculture,” said Spinelli. “WR-IPPS is a great opportunity to showcase the extraordinary San Diego nursery and greenhouse industry on an international stage, and a perfect occasion for clientele to meet our new UC Cooperative Extension advisors.”
Bruno Pitton, who became the UCCE environmental horticulture advisor for Placer and Nevada counties in November, appreciated the increase in science-based talks compared to previous years.
“Before, there were more talks on production practices from grower to grower. This year, I noticed that there's more science extension talks – which is a good thing,” said Pitton, who also gave a presentation on nitrogen management in nursery production and irrigation training.
Recent UC ANR hires like Emma Volk, production horticulture advisor for Ventura and Santa Barbara counties, had the opportunity to learn not only from industry leaders nationwide, but fellow ANR colleagues. For example, she heard Don Merhaut, UCCE specialist for nursery and floriculture crops based at UC Riverside, present on controlled release fertilizer dynamics in containers during a one-year growing cycle for Southern California.
UCCE advisors and specialists had a significant presence at this year's meeting, leaving a positive impression on attendees, including Tony Shireman, WR-IPPS president, who said that partnering with UC ANR experts helps IPPS achieve its mission to seek and share plant knowledge globally.
“We're fortunate to have connections to people like those joining us from Cooperative Extension. It allows us to expand our knowledge and extend our reach,” Shireman said.
Johanna Del Castillo Munera and Kosana Suvocarev, two professors of Cooperative Extension at UC Davis, also attended and joined Spinelli for both English and Spanish sessions. Del Castillo Munera presented on disease challenges and management for nurseries, and Suvocarev talked about crop water requirements for irrigation scheduling in nurseries and greenhouses.
“There's a good sense of community here and there's a lot of passion from the speakers,” said Grant Johnson, UCCE urban agriculture technology advisor for UCCE Los Angeles and Orange counties, adding that he valued the opportunity to learn from growers and scientists simultaneously.
After attendees spent an entire day touring local nursery and floriculture operations and learning from growers in North San Diego County and Riverside County, they concluded the day with a dinner and keynote address from Karen Ross, California Department of Food and Agriculture secretary.
On the last day, Chris Shogren, UCCE environmental horticulture advisor for Los Angeles County and member of UCNFA's administrative committee, and Eric Middleton, UCCE integrated pest management advisor for San Diego, Los Angeles and Orange counties, talked about pest and pathogen management. The advisors offered fascinating visuals including photos comparing the size of agave mites to a penny, and led a stimulating Q&A session.
To learn more about the UC Nursery and Floriculture Alliance, visit https://ucnfa.ucanr.edu/.
- Author: Grace Dean
For the past four years, Kim Ingram has been listening closely to the private forest landowners who participate in her Forest Stewardship Workshop series. During the workshops, landowners share their experiences clearing thickets of vegetation, replanting post-wildfire and tackling invasive species, and their concerns of who will take care of their forest when they're gone.
To alleviate their stress, Ingram–Forest Stewardship Education coordinator with University of California Agriculture and Natural Resources–turns to natural resource professionals from CAL FIRE, local Resource Conservation Districts, and the U.S Forest Service who can share knowledge and resources with participants. Recently, Ingram developed a story map that aims to provide landowners with a platform they can use to share their experiences and ways that they have been empowered to manage their land.
"It's not uncommon for small forest landowners to feel overwhelmed with their forest management responsibilities and uncertain over what steps to take first," said Ingram. "Through the Forest Stewardship Workshops and this story map project, we hope to show that there is an entire community of forest landowners in the same situation, learning from each other and moving forward towards their management goals."
The Forest Stewardship Story Map team used ArcGIS StoryMaps to design the project, with 15 participants providing interviews and visual content. StoryMaps provides a user-friendly interface where website visitors can either click on a county to view specific interviews or scroll to view the stories.
The forestry team plans to interview at least one landowner and natural resource professional in every forested county in California so private forest landowners have a local contact or can become inspired by a project in their area.
Theresa Ciafardoni, a forest landowner in Nevada County, said that the UC ANR Forest Stewardship Workshop helped her manage postfire restoration and long-term land use planning.
"It opened up so many options and possibilities," said Ciafardoni. "All the individuals who presented in the Forest Stewardship Workshop were open to phone calls for specific questions and provided invaluable technical assistance."
Involving landowners and forestry professionals with this project was an early decision made by Ingram, who believed it was important that the map held appeal beyond hosting stories. Now, the project functions as a networking tool for landowners seeking professional assistance, too.
Past Forest Stewardship Workshop presenters shared their contact information and the motivations behind their forest management work so that landowners could find assistance in their area. The professionals currently hosted on the map include Resource Conservation District managers, UC ANR forestry advisors and private contractors.
"The most motivated landowners are invested not only economically, but their heart is into it," said Ryan Tompkins, UC Cooperative Extension forestry advisor for Plumas, Sierra and Lassen counties. "The natural world is full of uncertainty, but they're committed to continuing education and learning about how to be a good land steward. This takes a certain level of humility recognizing that our tenure as a steward on the land is a very short period of a forest's lifetime."
Looking ahead, the team envisions the map as a working document that will eventually include interviews with indigenous tribal members who focus on traditional ecological knowledge projects, interviews and information from the UC ANR Postfire Forest Resilience Program, and a feature that will filter stories by topic (e.g. reforestation or prescribed burning).
"This isn't a project that could be completed by one person," explained Grace Dean, Forest Stewardship communications specialist. "The same way that Kim and other presenters explain forest management as a collaborative process holds true for this project."
The Forest Stewardship Workshop series gives participants the ability to start as beginners and build upon their knowledge and experiences. In the same vein, this story map provides the Forest Stewardship team a solid base of real stories to add on to over time. The hope is that it will grow into a multifaceted tool reaching new forest landowners, eventually enveloping their stories within the small forest landowner community.
To view the Forest Stewardship Story Map, visit: https://storymaps.arcgis.com/stories/bd062108d9894da7920d7aef06fe2c2c.
- Author: Mike Hsu
John Karlik, UC Cooperative Extension advisor in Kern County for environmental horticulture and environmental science, will retire July 1. Karlik began his work in Kern County in 1984 with an emphasis on the commercial rose plant industry and local horticulture outreach.
Karlik's teaching activities included five levels of 12- to 15-week horticulture education classes offered in three locations in Kern County, usually two or three classes held each year. For the past 25 years, he has collaborated with Darrell Feil, co-owner of Abate-a-Weed in Bakersfield, to hold landscape management seminars that connect community members with experts on a wide range of topics.
“What I love about John is a couple of things: first, his knowledge base is amazing – he's a treasure of Kern County, for what he's done education-wise,” Feil said. “And second, he has a very active mind – and so many people benefit from that in our community.”
Karlik expanded his teaching to include 10 horticulture study tours to gardens and landscapes of Europe and Asia, and the photographs from those visits enhanced his outreach and contributed to his chapters on landscape design in the Arizona and UC Master Gardener Handbooks.
He earned his B.S. in soil science from the University of Minnesota and M.S. in horticulture from Michigan State University.
Taking advantage of UC Agriculture and Natural Resources' flexibility and sabbatical leave, he completed a doctorate at UCLA in Environmental Science and Engineering, and changed his research focus to air-quality-related projects. That led to a lecture series on atmospheric science and policy, including climate change, which Karlik offered annually for 15 years as a visiting professor at Central European University in Budapest, and resulting in a service award from that institution.
In recent years, he led four tours to study ecosystem response in the still-radioactive Exclusion Zone at Chernobyl, Ukraine, site of the world's worst nuclear accident.
In response to the COVID-19 pandemic, Karlik shifted from in-person classes and offered 75 hour-long Zoom presentations on horticulture, landscape design, climate change and environmental science topics, finding an audience in California and in other states.
Karlik also has held a variety of positions in ANR committees, including Academic Assembly Council and the Communications Advisory Board.
“I especially appreciate the many collegial relationships I have within UCCE, ANR, and on several campuses,” Karlik said. “Authorship on many publications reflects those relationships.”
In retirement, Karlik expects to offer assistance at the UCCE office in Kern County and as an editor for a forthcoming ANR book. He intends to pursue interests in instrumental music and the study of languages.
“We've been really blessed to have a guy like John around,” Feil said.
- Author: Jeannette E. Warnert
California oak woodlands are highly prized ecoregions where stately trees, many of them hundreds of years old, are cornerstones of a habitat for wildlife and native plants. Sadly, some of these ecosystems are seriously threatened by exotic pests and diseases, encroachment by less desirable vegetation, and wildfire.
Each year, UC Cooperative Extension hosts workshops to share scientific developments aimed at conserving these important habitats – and the economic value of ranching – on oak woodlands, which are found on the lower elevation slopes of the Sierra Nevada, the Coast Range and other foothill areas of California.
Typically, the workshops are held in person and draw moderate-sized audiences for presentations, questions and answers, and field trips. Because of the COVID-19 pandemic, this year's workshop was offered online in April with pre-recorded presentations available for viewing at the participants' convenience and a live question-and-answer session on Zoom.
The retooled event garnered 500 registrants, over 300 views of the YouTube videos and 140 participants in the live Q&A session. The presentations and Q&A session are still available online for future viewing as well.
“People from all walks of life participated, including those with professional and personal interest in oak woodlands,” said Yana Valachovic, UCCE forest advisor in Humboldt and Del Norte counties and a conference organizer.
Presentations at the 2020 conference included the following topics:
Encroachment by Douglas-fir
In Northern California, the biodiversity of oak woodlands is being threatened by Douglas-fir encroachment. The oaks' shade helps the young conifers get established with protection from harsh sun. In time, the fast-growing Douglas-fir trees pierce the oak canopies and begin to crowd out the areas' native understories, which are important for the diversity of birds, mammals and reptiles attracted to oaks.
As the Douglas-fir continue to grow and multiply, they threaten the very lives of the oak trees and the unique ecosystem they dominate.
To better understand the Douglas-fir encroachment, Valachovic established 10 research sites in Humboldt and Mendocino counties to gather information about the fate and the age of oaks. She and her research partners determined the ages of the oaks and firs, and counted the seedlings, saplings, snags and understory vegetation.
“With this research, we were able to demonstrate that even though the oak trees can be smaller in diameter they are much older than the Douglas-fir trees,” Valachovic said. “The encroachment process is happening quickly, and the oaks are falling out of the system.”
The shift appears to have been initiated in the mid-19th and early-20th centuries, coinciding with the Gold Rush and wildfire suppression.
With the data confirming Douglas-fir encroachment, Valachovic turned her attention to oak woodland restoration. At 14 sites in Humboldt and Trinity counties, her team studied the effects of Douglas-fir removal.
“Grasses and forbs under the oaks reestablished. Diameter growth on the oaks increased,” she said.
These research findings contributed directly to changes in policy that had previously limited land owners' ability to remove and sell conifers encroaching on oak woodland. The research also helped create new funding opportunities to support oak woodland restoration and conservation in Northern California.
Case study of oak woodland wildfire recovery
In July 2018, about two-thirds of the 5,289-acre UC Hopland Research and Extension Center was burned by the River Fire.
The transformation of the land, which had likely been without a large wildland fire for at least 100 years, was intense and stressful, said UC Cooperative Extension forest advisor Michael Jones. However, it also provided a unique opportunity for researchers to compare the impact of wildfire on the resiliency of vegetation on grazed and ungrazed oak woodland.
Jones established 35 one-fifth acre research plots at the research center and collected data two months following the fire and one year later. The research will continue in the future to better understand long-term impacts, but Jones was able to share revealing early results at the workshop.
Right after the fire, in severely burned areas areas, the future of the oaks looked ominous. Jones predicted 40% tree mortality.
“The oaks were exposed to persistent, intense heat. They were cooked,” he said. “But two months after the fire, we were already seeing basal sprouts. This was an amazing response by the trees. Oaks are pretty damn tough.”
A year after the fire, surveys showed that tree mortality in the burned areas was 25%, much less than Jones' early predictions. While some management for specific situations in severely burned areas may be necessary – such as removal of hazard trees, reducing fuels in defensible spaces or removal to control invasive species – the results of this work show the trees recover naturally.
“Esthetically, I know these systems aren't as pleasing as they were before, but ecologically, they are healthy and recovering,” he said. “In 100 years, it will look just as good as before the fire.”
Fire impacts in woodland areas previously grazed and not grazed
The fire on the research station also permitted Jones to compare the fire's differing impact on non-grazed and grazed oak woodland. At first, the grazed areas looked almost unscathed with minimal flame scorching on the bark, while an area where the pasture hadn't been grazed for 25 years had evidence of much higher severity fire.
“Grazing is a phenomenal way to help manage fuels,” Jones said. However, the grazed areas displayed ecological shortcomings a year later.
“In grazed pastures, the large mature trees were still alive, but there was no oak regeneration (basal sprouting or seedlings),” Jones said. “In the ungrazed area, a lot of biomass had been killed, but there's nearly 100% resprout of oak trees and we have an impressive amount of oak seedling recruitment.”
Jones said he isn't discouraging grazing.
“But it is important to protect sites from grazing, and especially wildlife browse, when a landowner or land managers' objectives are to regenerate or conserve oak woodlands,” Jones said.
New ambrosia beetle another threat to California oaks
Akif Eskalen, UC Cooperative Extension specialist in the Department of Plant Pathology at UC Davis, has identified a new insect-fungus team that causes oak borer wilt in Northern California Valley and Blue Oaks. It is an ambrosia beetle, commonly known as Mediterranean Oak Borer, which carries several fungi in its mouth. The beetle bores into the tree and introduces fungi to grow for food. The fungi spreads and disturbs the transportation of water and nutrients, causing wilt in the tree.
The oozing and staining lesions on the bark are similar to other oak fungal diseases, such as Sudden Oak Death. The beetle – native of Mediterranean basin countries in Africa, Asia and Europe – cannot fly far, so most likely is transported for long distances on infested firewood.
During the workshop, Eskalen suggested not moving firewood, removing heavily infested trees and chipping infested wood into 1-inch particles to reduce the spread of the ambrosia beetle and its fungal partner. He asked viewers to report any suspected oak tree infestations to the local agricultural commissioner, CDFA Diagnostic Laboratories, UC Cooperative Extension advisors or CALFIRE. Chemical options for sparing oaks from the ambrosia beetles' devastation are under investigation.
Threats to oaks and other native plants from root rotting Phytophthora
Restoration plantings have inadvertently introduced plant pathogens to native oak woodland ecosystems in California, said Ted Swiecki of Phytosphere Research, an organization that provides consulting services related to natural resource management, horticulture, urban forestry, and agriculture. The group of pathogens causing the damage are largely from the Phytophthora genus, first described in the 1860s. The name translates from Greek to “plant destroyer.”
Swiecki has observed when Phytophthora infested plants and soils are introduced to native habitats, the pathogens can attack various native plants, including toyon, madrone, manzanita and full-grown oaks. Once established, the pathogen can spread along drainages, by moving soil from one area to another and by hitchhiking on equipment, tires and hiking boots.
The pathogen can easily be overlooked at nurseries, which, by their nature, have conditions that favor Phytophthora development. Plants at nurseries are well watered, have high root density and are often placed on the ground where they can pick up pathogens.
He said the best approach to tackling Phytophthora is not using nursery stock for restoration or beautification of natural oak woodland. Direct seeding, using natural regeneration, or onsite propagation are safer ways to enhance vegetation in oak woodland.
“It's easier to prevent Phytophthora from being introduced in the first place and much cheaper and more effective than trying to eradicate it later,” Siewcki said.
- Author: Pamela Kan-Rice
Wendy Powers, associate vice president, announced the 2018 winners of the biennial Distinguished Service Awards on April 11 at the UC ANR Statewide Conference in Ontario.
Sponsored by UC ANR and Academic Assembly Council, the Distinguished Service Awards recognize service and academic excellence in UC Cooperative Extension over a significant period of time. Awards highlight the use of innovative methods and the integration of research, extension and leadership by UC ANR academics.
Awards were given for outstanding research, outstanding extension, outstanding new academic, outstanding team, and outstanding leader. Winners for each category are listed below.
Outstanding Research - Youth Retention Study Team
The Youth Retention Study examined the retention and drop-out rates (nearly 50 percent) of first year 4-H members. The team looked at re-enrollment trends over a seven-year period to understand the phenomena of why youth leave the 4-H program. While the focus of the study was on California, the team has engaged multiple states in this effort to document the national scope of this issue, and used the data to develop tools and strategies for addressing and extending that information through peer-reviewed articles, workshops and training. Two of the factors they found reducing retention were a lack of communication and the inability to understand and navigate the 4-H program. These findings led to development of a handbook for families to navigate the 4-H program and a Project Leader Checklist for implementing the 4-H project experience.
The Youth Retention Study Team includes
- JoLynn Miller, CE Advisor - UCCE Central Sierra Multi-County Partnership
- Kendra Lewis, Academic Coordinator - UC ANR Statewide 4-H Program
- Marianne Bird, CE Advisor - UCCE Capital Corridor MCP
- John Borba, CE Advisor - UCCE Kern
- Claudia Diaz-Carrasco, CE Advisor - UCCE Riverside and San Bernardino
- Dorina Espinoza, CE Advisor - UCCE Humboldt and Del Norte
- Russell Hill, CE Advisor - UCCE Merced, Mariposa and Madera
- Car Mun Kok, CE Advisor - UCCE Lake and Mendocino
- Sue Manglallan, CE Advisor - UCCE San Diego
- Kali Trzesniewski, CE Specialist – UC Davis, Department of Human & Community Development
Outstanding Extension - David Haviland
David Haviland has been the UC Cooperative Extension entomology advisor in Kern County and affiliated IPM advisor with the UC IPM Program since 2002. He has developed an exemplary extension program to address the needs of clientele and support continued productivity in the third largest agricultural output county in the nation. Haviland's extension program is based on continuous needs assessment, applied local research to solve problems, collaboration with multiple partners, and extension programming focused on grower and pest control adviser adoption of improved pest management practices. Haviland uses his research outputs to drive his prodigious extension program. This includes 430 presentations to more than 32,000 people, primarily to farmers and pest control advisers. Haviland has developed a national and international reputation through publishing the results of his research in peer-reviewed scientific publications, and by giving national and international presentations.
Outstanding New Academic - Katherine Soule
Katherine Soule has been the youth, families and communities advisor since 2013 and director of Cooperative Extension in San Luis Obispo and Santa Barbara counties since 2017. Soule has guided programming to increase diversity and reach of the 4-H Youth Development Program. She has more than doubled overall youth participation to more than 16,000 youth in the two counties and increased Latino youth participation by almost 500 percent in less than 4 years. In addition, Soule has built a multicultural, bilingual UC CalFresh staff that focuses on developing sustained engagement with partnering school districts, administrators, teachers, families and other community-based organizations. In the previous two years, the UC CalFresh staff provided nutrition education to more than 17,000 youth; more than 8,500 families and community members attended community events where they received nutrition education; led peer educators in the participation of 4,700 hours of programming and engaged more than 6,600 students in nutrition and physical activities education. The Statewide 4-H Director said, “Despite the large assignment, she has provided incredible leadership in both program areas in both counties.” In partnership with 4-H volunteers and the California 4-H Foundation, she has raised $300,000 annually from grants and gifts to support and advance 4-H programming in Santa Barbara County. This youth, families and communities program also serves as the model for program integration and growth.
Outstanding Leader - Cheryl Wilen
Cheryl Wilen is the area integrated pest management advisor for San Diego, Orange and Los Angeles counties. Throughout her 23-year career, Wilen's work has represented outstanding leadership through a continual focus on positive changes. Wilen has been an effective leader in the Statewide IPM Program, ANR and the western region. In this role, she has provided significant input on CE advisor performance and advancement evaluations, represented IPM advisors to UC IPM leadership, and coordinated the annual extension planning meeting for IPM advisors and affiliated advisors. In addition to significant leadership in UC IPM, Wilen was the ANR Strategic Initiative Leader for Endemic and Invasive Pests and Diseases from 2014 to 2017. She led development of the strategic initiative goals and worked with Program Teams and Workgroups to address these goals. Wilen's leadership style is a direct reflection of her approach to research and extension. If she identifies an important unmet need, then she seeks to address it. Similarly, when she identifies a leadership need that she is capable of meeting, she steps up to help the organization move forward. Her leadership is consistently pragmatic and focused on results.
Outstanding Team - Dairy Quality Assurance Environmental Stewardship Program Team
This team of CE specialists and CE advisors has provided outstanding service to California's dairy farmers as a partner in the California Dairy Quality Assurance Program (CDQAP) through applied research, development of monitoring methods and tools, and implementation of educational programs to help dairy farmers comply with state water-quality law. The team developed the educational component of the “Environmental Stewardship Short Course,” delivering 377 short course workshops (750 classroom hours) throughout the state to date. They developed tools for producers including a lab manual for manure analysis, an e-learning module for sampling methods and an on-line decision support tool. These extension products were based on a prodigious research record including 15 peer-reviewed papers. The Dairy Quality Assurance Environmental Stewardship Program Team is an excellent example of UC ANR academics working together and with government and industry partners under the Sustainable Natural Environment Strategic Initiative. As a result of the team's work, the industry quickly reached a 95 percent compliance rate with water quality reporting requirements.
Dairy Quality Assurance Environmental Stewardship Program Team includes
- Deanne Meyer, CE Specialist – UC Davis, Department of Human & Community Development
- Betsy Karle, CE Advisor and UCCE Director– UCCE Glenn
- Jennifer Heguy, CE Advisor – UCCE Stanislaus, San Joaquin and Merced
- David Lewis, CE Advisor and UCCE Director – UCCE Marin and Napa
- Jeffery Stackhouse, CE Advisor – UCCE Humboldt and Del Norte