- (Focus Area) Environment
- Author: Kathy Keatley Garvey
During his 37-year UC Davis career, Leigh was based at the Kern County Shafter Research and Extension Center, also known as the U.S. Cotton Research Station. At Shafter, Leigh focused his research on the biology, ecology, host plant resistance, control and management of insects and spider mites on cotton.
He stood at the forefront of Integrated Pest Management (IPM) of cotton pests, according to an article in the summer 1994 edition of American Entomologist. He taught courses on cotton IPM and host plant resistance. He researched pest and beneficial arthropod management in cotton fields, and host plant resistance in cotton to insects, mites, nematodes and diseases.
Leigh joined the UC Davis Department of Entomology in 1958, retiring in 1991 as an emeritus professor. However, like many emeriti, he continued to remain active in his research and collaboration until his death on Oct. 26, 1993.
His work as an agricultural inspector with the Riverside County Agricultural Commissioner's Office from 1944-1945 sparked his interest in entomology. He received his bachelor of science degree in entomology from UC Berkeley in 1949, and his doctorate in entomology there in 1956. His thesis was on the influence of light, temperature and humidity on flight activity of the butterfly, Colias and involved both field and laboratory investigations.
Leigh served as an assistant professor at the University of Arkansas from 1954 to 1958, where he worked on the biology, ecology and control of pink bollworm and boll weevil, using chemicals and cultural means. He joined the UC Davis Department of Entomology, advancing from assistant entomologist to associate entomologist in 1963. In 1968, he was promoted to adjunct lecturer and entomologist.
During his career, he advised many graduate students who went on to become renowned entomologists in cotton IPM around the world,” wrote Charles E. Jackson of Uniroyal Chemical, Clovis, Calif., and J. Hodge Black, UC Cooperative Extension, Bakersfield in the American Entomologist. For his achievements in teaching and research, Leigh received the James H. Meyer Recognition Award for Distinguished Achievement Service Award in 1988.
Leigh served as president of the Pacific Branch of ESA in 1981. He also served on the ESA Governing Board and was a founding member and past president of the American Registry of Professional Entomologists (ARPE). In 1981 he received the ARPE Outstanding Entomologist Award. Leigh was elected as a director to the Board Certified Entomologists' certification board in 1993.
In addition, Leigh was active in the American Association for the Advancement of Science and was the founding president of the San Joaquin Entomology Association. He held membership in several other associations, including the Association of Applied Insect Ecologists, the Ecological Society of America, and the American Archeological Society. The UC Davis entomologist was a past president of the Shafter Rotary Club and also active in the Boy Scouts of America.
During his 37-year career, he authored more than 127 peer-reviewed publications.
“His many colleagues considered his research and teaching to be outstanding,” wrote authors Jackson and Black in the American Entomologist. “Leigh's caring, enthusiasm, intellect, expertise and professionalism were regarded highly by all who knew him.”
In his memory, his family and associates set up the Leigh Distinguished Alumni Seminar Entomology Fund. When his wife, Nina Eremin Leigh (1929-2002) died, the alumni seminar became known as the Thomas and Nina Leigh Distinguished Alumni Seminar.
He will speak on "Our Changing Menu: Using the Power of Food to Confront Climate Change" on Monday, Oct. 14 in the Putah Creek Lodge, 685 Putah Creek Lodge Drive. The event begins at 4 p.m. and will include a social, lecture and dinner. The event is open to department faculty, staff and students. (See news story.) The lecture will be recorded.
Hoffmann was selected the 2020 recipient of the Leigh Seminar Award, but the COVID pandemic intervened and other dates conflicted. This is the first Leigh Seminar since 2020.
A native of Wisconsin, Hoffmann holds a bachelor of science degree (1975) from the University of Wisconsin, and his master's degree from the University of Arizona (1978). He received his doctorate in entomology from UC Davis in 1990, studying with Professor Ted Wilson and later Professor Frank Zalom, an integrated pest management specialist and a past president of the Entomological Society of America. Hoffmann served with the U.S. Marines in Vietnam from 1967 to 1971, attaining the rank of sergeant.
He remembers well his experiences at UC Davis. “I was privileged to work with many dedicated faculty in entomology and several other departments.”
1996: Michael Irwin
1990: Lowell "Skip" Nault
2004: Kenneth Yeargan
2008: Mary Purcell-Miramontes
2010: Murray Isman
2011: Gary Felton
2011: Brian Fisher
2012: Marc Tatar
2013: Kenneth Haynes
2015: Tim Paine
2017: Jennifer Thaler
2018: Robert Page Jr.
- Author: Kathy Keatley Garvey
And it's double delightful with twins!
Such was the case at the Vacaville Museum Guild's recent Children's Party when two-year-old twins Ford and Wyatt Devine were thumbing through "The Story of the Dogface Butterfly," a children's book written by UC Davis doctoral alumna Fran Keller, a Folsom Lake College professor and a Bohart Museum of Entomology research scientist.
The twins, along with big brother, Buck, 7, were among the youngsters fascinated by the book, which features macro images by Bohart associate Greg Kareofelas and illustrations by Laine Bauer, then a UC Davis student.
It was just one of the many attractions at the annual Children's Party, held Aug. 8 in the museum courtyard.
Not many know that the butterfly's most prevalent habitat is the 40-acre Shutamul Bear River Preserve near Auburn, on a Placer Land Trust conservation site; Kareofelas serves as a docent on the Placer Land Trust tours. (See virtual tour on YouTube). The butterfly is there because its larval host plant, false indigo (Amorpha californica), is there.
Are there dogface butterflies in Vacaville? Yes. The butterfly's breeding grounds include Gates Canyon. (See UC Davis emeritus professor Art Shapiro's website.)
Director of the insect museum is Professor Jason Bond, the Evert and Marion Schlinger Endowed Chair, UC Davis Department of Entomology and Nematology, and associate dean, Agricultural Sciences, UC Davis College of Agricultural and Environmental Sciences.
Meanwhile, Bohart scientists are gearing up for their next open house, set for 1 to 4 p.m., Saturday, Sept. 28. The theme is "Museum ABC's: Arthropods, Bohart and Collecting." All open houses are free and family friendly. Parking is also free. For more information, contact bmuseum@ucdavis.edu or access the website at https://bohart.ucdavis.edu.
- Author: Pamela S Kan-Rice
Learn the how, where and why fire is used to manage the natural landscape at the Central Coast Good Fire Fair on Saturday, Oct. 5. The fair is free and open to the public from 10 a.m. to 3 p.m. at Henry Cowell Redwoods State Park in Felton in Santa Cruz County. The event is sponsored by the UC Agriculture and Natural Resources Fire Network and California State Parks.
“You can witness a live prescribed fire in the redwood grove and learn about using fire in our coastal ecosystems,” said Barb Satink Wolfson, UC Cooperative Extension fire advisor for San Benito, Santa Clara, Monterey and Santa Cruz counties.
Representatives of California State Parks, CALFIRE, indigenous groups and the Central Coast Prescribed Burn Association are scheduled to talk about how they work with fire.
The Good Fire Fair will offer educational activities for children and adults:
- Learn how to safely build, tend and extinguish a campfire
- Watch live burns of piles and redwood understory growth (likely between 11 a.m. and 1 p.m., depending on the weather)
- Savor sandwiches, burgers and Venezuelan food from local food trucks
- Observe demonstrations and visit informative booths
- Learn how to make your home more resilient to wildfire
- Test your fire knowledge and win prizes
“Kids will get to see a wildland fire engine up close, try fire science experiments and play educational games. Bring a camera,” said Satink Wolfson. “Knowledge feeds the soul, but two of Santa Cruz's best food trucks will feed your hunger!”
The event is free, but parking at the park is $10. No registration required.
- Author: Kathy Keatley Garvey
UC Davis distinguished professor emerita Lynn Kimsey, director of the Bohart Museum of Entomology for 34 years until her retirement on Feb. 1, 2024, is among the 17 emeriti featured in a newly released video tribute to emeriti, an annual public service project by UC Davis distinguished professor Walter Leal.
The 17 featured represent about 20 percent of UC Davis faculty who retired in 2023-24.
Kimsey is a recognized authority on insect biodiversity, systematics and biogeography of parasitic wasps, urban entomology, civil forensic entomology, and arthropod-related industrial hygiene. A UC Davis entomology alumna, she received her undergraduate degree in 1975 and her doctorate in 1979.
Kimsey joined the entomology faculty in 1989 and became the Bohart Museum director in 1990. Although officially retired, she continues her research and as executive director of the Bohart Museum Society. She writes and publishes the quarterly newsletter.
In the video, Leal notes that Kimsey "is an entomologist interested in the systematics of stinging wasps, insect biotic diversity, and urban entomology...she provided insect diagnostics for the public and corporations, non-profit organizations, and governmental agencies."
"Her research focused primarily on cuckoo wasps, hornets, and tiphiid wasps, describing more than 30 new genera and 300 new species of wasps. Her fieldwork included biotic surveys of the insect fauna of various desert sand dune systems in California and tropical habitats in Central America and Southeast Asia."
Kimsey served as president of the International Society of Hymenopterists from 2002-2004, and as a member of the board of directors of the Natural Science Collections Alliance in 2000 and 2001. The Pacific Branch, Entomological Society of America (PBESA) singled her out for its highest honor, the C. W. Woodworth Award, in 2020. She received the PBESA Systematics, Evolution, and Biodiversity Award in 2014 and was a member of "The Bee Team" that won the PBESA Outstanding Team Award in 2013. The UC Davis Academic Senate honored her with its Distinguished Scholarly Public Service Award in 2016 in recognition of her outstanding work. And in 2023, CA&ES selected her as the recipient of its Exceptional Faculty Award. She was honored with a 21-insect net salute in April.
In addition to the faculty highlights, Leal included brief messages by Chancellor Gary May, Provost Mary Croughan, and Suad Joseph, the UC Davis Emeriti Association (UCDEA) president. UCDEA interviews and records emeriti who have made "significant contributions to the development of the university." See Video Records Project.
"I know our emeriti are feeling the energy at UC Davis as we prepare to greet our incoming class of students," said Chancellor May in the video transcript. "I want to extend a welcome to all our emeriti professors and encourage you to remain involved in our vibrant campus activity just as you've been such an important part of our success."
Those featured on the video tribute, in order of appearance:
- Stuart Meyers, professor emeritus, Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine
- Peter Mundy, emeritus distinguished professor, Department of Education, and the Department of Psychiatry, College of Letters and Science
- Vaidehi Ramanathan, professor emerita, Department of Linguistics, College of Letters and Science
- Scott Simon, distinguished professor emeritus, Department of Biomedical Engineering, College of Engineering
- Bruce German, distinguished professor emeritus, Department of Food Science and Technology, College of Agricultural and Environmental Sciences
- Lynn Kimsey, distinguished professor emerita, Department of Entomology and Nematology, College of Agricultural and Environmental Sciences
- Leonard Abbeduto, professor emeritus, Department of Psychiatry and Behavioral Sciences, School of Medicine
- Lynette Hart, professor emerita, Department of Population Health and Reproduction, School of Veterinary Medicine
- Frank Sharp, distinguished professor emeritus, Department of Neurology, School of Medicine
- Stephen Wheeler, professor emeritus, Urban Design and Sustainability, Department of Human Ecology, College of Agricultural and Environmental Sciences
- Esther Kim, professor emerita, Eye Center, School of Medicine
- Julia Menard-Warwick, professor emerita, Department of Linguistics, College of Letters and Science
- Mohamed Hafez, professor emeritus, Department of Mechanical and Aerospace Engineering, College of Engineering
- Geoffrey Schladow, professor emeritus, Department of Civil and Environmental Engineering, College of Engineering
- Gail Taylor, distinguished professor emerita, Department of Plant Sciences, College of Agricultural and Environmental Sciences
- Paul FitzGerald, distinguished professor emeritus, Department of Cell Biology and Human Anatomy and Department of Ophthalmology and Vision Science, School of Medicine
- Alan Balch, distinguished professor emeritus, Department of Chemistry, College of Letters and Science
Additionally, Leal spotlighted (1) an emeriti “caught on camera” (Geerat J. Vermeij) heading to work two years after his retirement ("to stress how many members of the Emeriti remain engaged in UC Davis affairs"), and (2) UC Davis faculty member (Alan Balch) who broke the record on the number of years of service to the University of California (56 years, which included 52 at UC Davis).
Leal creates an annual tribute to UC Davis emeriti as a public service to celebrate their accomplishments as they enter a new chapter in their lives. It is a zero-budget, one-person production.
Leal launched his first "Tribute to Our New Emeriti," featuring 24 professors from eight colleges and schools who transitioned to emeriti in 2021-2022. (See news story.) The 2022-23 tribute is here. (See news story)
Leal, a member of the Department of Molecular and Cellular Biology faculty since 2013, is a former professor and chair of the Department of Entomology. He is the first UC Davis faculty member to win all three of the Academic Senate's most coveted awards: in research, teaching, and public service. Leal received the 2020 Distinguished Teaching Award for Undergraduate Teaching; the 2022 Distinguished Scholarly Public Service Award; and the 2024 Distinguished Faculty Research Award.
- Author: Kathy Keatley Garvey
Nematodes are where it's at!
Two UC Davis nematology doctoral students were invited to give research presentations at the international Society of Nematologists' conference in Park City, Utah and they excelled.
Meet the two young women: Alison Blundell, a doctoral candidate who was invited to compete in a 12-minute student oral competition to discuss her research on root-knot nematodes, and doctoral student Veronica Casey, invited to share her research on "Pathogenic Hitchhikers."
Their major professor, Shahid Siddique, encourages his students to participate in the Society of Nematologists (SON), an international organization that advances the science of nematology in both its fundamental and economic aspects.
Blundell, who anticipates receiving her doctorate in 2026, won second place in the international competition with her presentation, “Overcoming Resistance: Unraveling the Mechanisms Behind Root-Knot Nematode Evasion of Tomato Mi-Gene.” She received a $250 prize.
Blundell researches plant-parasitic nematodes specifically root-knot nematodes, and their molecular mechanism to defend against plant immune systems. In her abstract, she wrote: "Root-knot nematodes (RKNs) are among the most devastating pathogens of crops, causing substantial yield and economic losses worldwide. These parasitic organisms can infect over a hundred different plant species and can evade plant defense mechanisms by secreting a concoction of effectors. For decades, the Mi-1 resistance gene has been effective in detecting and inhibiting RKNs in tomatoes. However, the underlying mechanisms by which Mi-1 detects these pathogens remain largely unknown. In recent years, resistance-breaking populations have emerged in both greenhouse and field settings, posing a threat to the potency and effectiveness of the Mi-1 gene and, consequently, the tomato industry. "
"We used two strains of M. javanica, one strain VW4, which is recognized by Mi-1, and another strain, VW5, which was selected from VW4 and can overcome resistance mediated by Mi-1," Blundell explained. "Utilizing the newly constructed reference genome for M. javanica (VW4), we compared genomes of VW4 and VW5 and identified an approximately 50 kb region that is present in VW4 but missing in VW5. This missing region contains seven protein-coding genes, three of which encode putative effectors and are currently being tested as potential avirulence genes for Mi-1."
"In addition, we have conducted a series of infection assays on different host plants lacking Mi-1, and the results revealed a significantly lower egg count in VW5 when compared to VW4. We plan to expand these assays by testing additional M. javanica resistance-breaking strains collected from fields all over California to determine if this trade-off is consistent across other strains. Overall, our results suggest that although VW5 can overcome Mi-1, there is a trade-off in the form of compromised reproduction. This research helps to better understand the mechanism and components of Mi-1 and develop strategies for addressing resistance-breaking populations."
Pathogenic Hitchhikers
Doctoral student Veronica Casey delivered her invited presentation on “Pathogenic Hitchhikers: Investigating the Synergy of Bacteria and Nematodes on Plant Health.”
a"In the vast scope of soil ecology, plant-parasitic nematodes can forge alliances with other microbial adversaries, such as the disease complex formed between nematodes and bacterial wilt-causing Ralstonia spp.," Casey wrote in her abstract. "These disease complexes exacerbate disease symptoms and yield losses. Plant-parasitic nematodes are microscopic roundworms that cause approximately $100 billion in yield loss a year, and most of the damage is attributed to root-knot nematodes (RKNs; Meloidogyne spp.). Bacterial wilt is caused by multiple Ralstonia species, namely Ralstonia pseudosolanacearum, R. solanacearum, and R. sygzii that enter the plant's roots to colonize its vascular system. Prior to Ralstonia infection, RKN infection may facilitate bacterial disease by increasing access to the vascular tissue."
"However, little research has been conducted to elucidate the molecular details of this interaction," Casey pointed out. "Previous reports of RKN and Ralstonia spp. in the field hypothesized that the infection was due to root wounding and physiological changes. In this study, I will determine the nature of the interaction between Ralstonia and nematodes at both ecological and molecular levels. This research project will explore the hypotheses that 1) Ralstonia adheres to the cuticle of nematodes using specialized appendages called pili and 2) de novo xylem formation in the galls increases Ralstonia transport into the plant. A common strategy for preventing nematode infection is by using resistant plant cultivars."
"However, resistance-breaking nematode populations have arisen and we plan to utilize resistance-breaking nematodes, which are most likely to interact with bacterial wilt in the field," Casey noted. "This presentation will report on the attachment and greenhouse experimental results of the RKN-Ralstonia complex. The escalation of climate change is leading to increased instances of pathogenicity; therefore, it is crucial to uncover disease complexes which can have monumental consequences on food security. A meticulous study into the nematode and Ralstonia disease complex will support the management of these damaging pathogens across the world."
Blundell and Siddique also delivered invited presentations in the illustration workshop. Blundell gave her presentation on "Become an Illustrator Mender Simply by Using BioRender," and Siddique, "Doodle Your Data: Adobe Illustrator for Nematodes."
Other lab mates from the Siddique lab also participated in the SON meeting. (See news story). In the ecology session, doctoral candidate Chris Pagan participated from the UC Davis lab of distinguished professor Steve Nadler, former chair of the Department of Entomology and Nematology. Pagan's presentation: "Nematode Community Structure in the Rhizopsheres of Southern California Creosote (Larrea trientata).”
Of note, Blundell and Casey were among the four graduate students from the Siddique lab who received travel awards. Blundell won a Corteva award and Casey, a Certis award. Also receiving travel awards wer Ching-Jung Lin, a Bayer CropScience award and Romnick Latina, a N. A. Cobb Foundation award.
Honorary Member. At the 2024 conference, UC Davis distinguished professor emeritus Howard Ferris was selected a Honorary Member, the highest award that SON offers. (Feature story pending; wait 'til you hear his exciting life story!)
UC Davis nematologists are already looking forward to the next annual meeting: July 13-17 in Victoria, British Columbia, Canada. Meanwhile, you can chat one-on-one with them at the annual UC Davis Biodiversity Museum Day, usually held in February on the UC Davis campus. It traditionally featuring a dozen or so UC Davis museums. Student nematologists are spotlighted on the current website.