- (Focus Area) Natural Resources
- Author: Kathy Keatley Garvey
Those attending the Bohart Museum of Entomology's recent Moth Night learned all about silkworms, moths, cocoons and textiles at a display staffed by Michael "Mike" Pitcairn, a retired senior environmental scientist/supervisor with the California Department of Food and Agriculture.
Mulberry silk production originated in China at least 5000 years ago. Folklore indicates that the wife of a Chinese emperor watched a cocoon fall from a mulberry tree into her teacup. She reportedly watched the cocoon unravel, revealing a long delicate thread. She collected thousands of the threads and made a robe for the emperor.
Biology Professor Richard Peigler of University of the Incarnate Word, San Antonio, donated the items to the Bohart Museum in 2020, said UC Davis Distinguished Professor Emerita Lynn Kimsey, former director of the Bohart. "What's cool about it is," she said, "is that the silk pieces were made from silk produced by multiple silk moth species, not just the one we think of commercially."
The mulberry moth is the primary producer of silk. Tussah is the most well known of the wild silks.
Peigler has worked extensively with wild silk moths, studying their phylogeny, taxonomy and biology. His donations comprise the Wild Silks collection at the McGuire Center for Lepidoptera and Biodiversity, Florida Museum of Natural History, University of Florida.
"Wild silk is not nearly as luxurious as domestic silk found in today's clothing industry," the McGuire Center website relates. "This is raw, rough, and textured silk which feels almost paper-like to the human touch. This silk is harvested from the cocoons of various silk moths that encounter little to no human interaction. The practice of producing silk – termed sericulture, stretches back 5 millennia, and astonishingly, is a craft performed to this very day."
They included a woman's chaddar (head covering and shawl) and tablecloths.
Eri Silk (Samia ricini). Displayed was a woman's chaddar of 100 percent eri silk (Samia ricini), handwoven in Assam, India, and of naturally colored yarn. The brocade was done in traditional Assamese motifs. Women in rural villages in Northeast India wear these traditional shawls in winter. Peigler bought the chaddar for $47 from a seller in India in 2019.
Tussah Silk (Antheraea pernyi). Displayed was an antique tablecloth of tussah silk, handwoven in China in the 1920s or 1930s. The tablecloth, hand-reeled and in the natural beige color, is hand-embroidered with mulberry silk (Bombx mori). China has exported thousands of tablecloths and handkerchiefs made of tussah silk (called "pongee" or "Shantng silk") to the United States and the United Kingdom. Peigler purchased this tablecloth in April 2019 from an internet seller in Mount Dora, Fla., for $35.
Also of interest was a sample of tussah silk fabric in a pattern called "Honeycomb," mimicking the hexagonal cells in a bee colony. "The yarns were machine spun and the fabric was machine woven," said Peigler, who purchased the fabric from Oriental Silk Import Co. in Los Angeles for $32.95 per yard. There are several species of tussah silk moths (family Saturniidae) in China, India, Japan, Africa and North America.
Mulberry Silk (Bombx mori). Displayed was a tablecloth created in the early 1900s in China. "It was spun, woven and embroidered by hand," Peigler related.
The Bohart Museum, founded in 1946, is located in Room 1124 of the Academic Surge Building, 455 Crocker Lane, UC Davis campus. It also includes a live petting zoo and an insect-themed gift shop. Director of the museum is Professor Jason Bond, the Evert and Marion Schlinger Endowed Chair of UC Davis Department of Entomology and Nematology, and associate dean, Agricultural Sciences, UC Davis College of Agricultural and Environmental Sciences.
The Bohart Museum is open to walk-in visitors on Tuesdays from 9 a.m. to noon and from 1 to 4:30 p.m. through Aug. 27. It will be closed to the public Sept. 1-22.
The next open house is 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: Kathy Keatley Garvey
Meanwhile, here's another look at the Bohart Museum of Entomology's 2024 Moth Night, which drew widespread interest.
No one knows exactly how many moth events took place across the nation during National Moth Week, just as no one can predict how many species of moths and other night-flying insects will come to your porch light at night, or to your blacklighting display (UV light illuminating a hanging white sheet).
"Scientists estimate there are at minimum 150,000 moth species, and some believe that there could be over 500,000! Moths have been found that are small as a pinhead and as large as an adult-human's hand," according to NationalToday.com. "But of course, it's the incredibly complicated wing colors and patterns that make them especially dazzling."
A New Jersey non-profit organization, Friends of the East Brunswick Environmental Commission, launched the national event in 2012. The organization is dedicated to the conservation and promotion of the local environment.
The Bohart Museum's global collection of 8 million insects includes some 825,454 specimens of moths and butterflies, including 618,750 moths, ranging in size from the huge Atlas moths (10-inch wingspan) to the extremely tiny (4 mm wingspan) leafminer moths, says Jeff Smith, curator of the Lepidoptera collection. He and Bohart associate Greg Kareofelas showed dozens of moth specimens and answered questions.
What moths were drawn to the blacklighting display? (See list on Bug Squad blog). Retired UC Davis staff associate John "Moth Man" De Benedictus and his colleagues set up the blacklighting display. UC Davis doctoral student Iris Quayle fielded questions about the differences between moths and butterflies (See Bug Squad blog).
In today's blog, we share images of
- Moth-er Volkmar Heinrich, UC Davis associate professor of biomedical engineering
- Moth-ers UC Davis doctoral candidate Peter Coggan and his father, Pete Coggan of Minnesota (See Bug Squad blog)
- UC Davis student Kaitai Liu who showed stick insects and Madagascar hissing cockroaches from the live petting zoo
- UC Davis graduate student Riley Hoffman and fellow Bohart volunteer Barbara Heinsch, who staffed the family arts-and-crafts table.
Light Pollution. The Coggans answered many questions about light pollution. "Most organisms have come to rely on nighttime darkness for knowing when to reproduce, preparing for the winter, and moving around their environment," commented UC Davis doctoral student Peter Coggan. "The Industrial Revolution Artificial Light At Night (ALAN) has become a major conservation issue, disorienting and confusing countless species, often resulting in death. ALAN often kills or displaces organisms like bats, moths, and fireflies, making our nights less bio- diverse and more mosquito filled."
"Not only does it alter animal behavior but ALAN also has been linked to many human health issues like depression, obesity, and cancer," he said. "Although not widely known, ALAN is one of the easiest environmental crises to solve. Raising awareness and getting communities to reduce their light usage can solve the issue overnight and bring back the animals of darkness and the stars back to them."
The Bohart Museum's Moth Night also featured a display of various silk textile and cocoons, donated to the museum by Professor Richard Peigler of the University of the Incarnate Word, San Antonio. Bohart associate Mike Pitcairn, retired senior environmental scientist and supervisor, California Department of Food and Agriculture's Biological Control Program, staffed the table. (See more in upcoming Bug Squad blog.)
The Bohart Museum, founded in 1946, is located in Room 1124 of the Academic Surge Building, 455 Crocker Lane, UC Davis campus. Director of the insect museum is Professor Jason Bond, the Evert and Marion Schlinger Endowed Chair of UC Davis Department of Entomology and Nematology, and associate dean, Agricultural Sciences, UC Davis College of Agricultural and Environmental Sciences.
The open houses are free and family friendly. The next open house is on Saturday, Sept. 28 from 1 to 4 p.m. The theme: "Museum ABC's: Arthropods, Bohart and Collecting." Access the website at https://bohart.ucdavis.edu or email bmuseum@ucdavis.edu for more information.
- Author: Kathy Keatley Garvey
He's a male Mantis religiosa, as slim as a string bean, and scanning his environment.
We're accustomed to seeing see the native Stagmomantis limbata in our garden, and not M. religiosa, the European mantis, which is found throughout Europe, Asia, Africa, and North America.
"Males are often found to be more active and agile, whereas females are physically more powerful," according to Wikipedia. "Adult females are generally too large and heavy for their wings to enable a take-off...The great variation in the coloration of M. religiosa from different shades of yellow, brown, green, and sometimes black has been the cause of numerous hypotheses and studies for over 100 years.However, no generally accepted answer about reason, benefit, or mechanism of the coloration or the change of coloration has been found."
The male is apparently quite good at avoiding sexual cannibalism during mating. Wikipedia says: "Instead of just observing them, sexually mature males approach sexually mature females when they see them, but due to the physical superiority of the females, males of M. religiosa face certain challenges in doing so. When a female spots a male, she is very likely to attack and kill him (see also: Sexual cannibalism). Therefore, males can be observed to be very slow and cautious in their approach; after spotting a female, the male usually freezes and turns his head to look directly at her. Since the foveae in his eyes face directly forwards, he has the most accurate and detailed view of her and can watch every one of her moves. He then proceeds to approach her from behind. Males can be observed to stop as soon as the female turns her head or even moves. Mantids are very good at detecting moving structures, but are almost unable to see immobile objects. Using this ‘stop-and-go' tactic, the male stalks closer to the female. This can often take several hours. Depending on the environment, males sometimes show a light ‘rocking'-behavior which is believed to imitate the leaves of surrounding plants to blend in with the background. Males doing this had no higher probability of being detected and attacked, which supports this hypothesis of concealment."
We asked praying mantis scientist Lohit Garikipati about this European species. He holds a bachelor's degree from UC Davis and a master's degree from Towson University, Md., and is now PhD-bound at the Richard Gilder Graduate School in the American Museum of Natural History in the Jessica Ware lab.
"In my time at Davis I observationally did--they hold a special place for me as they were the first species that ever kept and raised in captivity!" said Garikapti, who shared his mantises and expertise at the Bohart Museum of Entomology open houses. "But they also highlighted to me the potential impact of invasive species on both native mantis species but also prey populations--as low foliage and ground dwelling predators, they have a different niche from S. limbata, and may be contributing to the decline of native Litaneutria (even as they have for the California mantis, Stagmomantis wheelerii). Adult females have also been observed feeding on fence lizards, without much apparent effort as they can take lizards even larger than they are. All of these factors combined with their cryptic ooth (ootheca) deposition and large clutch size have made them one of the most if not the most successful mantis species on the planet - they tolerate both cold and hot climates being found in deserts to temperate forests and now have a Holarctic distribution."
Garikipati related that in the Ware lab, he will be "investigating the evolutionary relationships of praying mantises and what drove their diversity."
We look forward to hearing more from Lohit! As for our buddy, the male M. religiosa, he took flight. (See video on YouTube).
- Author: Kathy Keatley Garvey
Born in Tonbridge, England, but a resident of Canada since 1945, Jeremy received his bachelor's degree in zoology, with honors, from the University of Western Ontario in 1969, and his doctorate in entomology and ecology from North Carolina State University in 1972. He served as a professor at Western Ontario from 2004 until his death.
"Jeremy died as he lived, tenacious and determined to the last--qualities that served him well as he blazed a trail through life," according to his obituary in Legacy.com. "He was recognised internationally as an eminent research scientist, publishing hundreds of papers, holding many positions of distinction and receiving countless accolades and awards. These include, among many others, President of the Royal Society of Canada, the Humboldt Research Fellowship in Germany, and the Order of Canada for his services to education. He was a passionate and enthusiastic educator his whole life, an ambassador equally at ease with everyone from VIPs to children."
"He received several national awards for his outreach activities, often saying the publication that he was most proud of was What is an Insect?, a children's book he co-wrote with Let's Talk Science which has been translated into five languages, and is used as a teaching aid in schools across Canada."
The professor, fondly nicknamed "The Bug Man," treasured his 500 (plus) insect-themed T-shirts, his favorite attire. One of them was "The Beetles," the all-time best seller designed and sold by the UC Davis Entomology Graduate Student Association. Mimicking The Beatles (George Harrison, Paul McCartney, Ringo Starr and John Lennon) crossing Abbey Road in a single file, the t-shirt depicts four beetles sauntering across the road. Beneath each beetle image is the family name: Phengogidae, Curculionidae, Cerambycidae and Scarabaeidae. Think glowworm beetles, snout beetles, long-horned beetles and scarab beetles.
"If you look closely," we wrote in a Bug Squad blog posted Dec. 4, 2023, "these UC Davis beetles are all wearing clothes--maybe designer clothes designed just for them? Three are barefoot, and one, the long-horned beetle, is wearing shoes. EGSA records don't indicate who designed The Beetles, but it's a keeper. It never fails to draw smiles. (EGSA sells this t-shirt and others at https://ucdavisentgrad.square.site.)
But back to Jeremy O'Neil and his love of insect-themed T-shirts. On July 26, his friend and colleague, UC Davis distinguished professor Walter Leal, recently elected a member of the National Academy of Sciences, posted an image on X (formerly Twitter) of McNeil wearing his UC Davis Beetles T-shirt. "Jeremy McNeil (Nov. 20, 1944 – July 18, 2024) had 500+ entomology-themed T-shirts, but this is--without a doubt--the number one! I am slightly biased because I like beetles in the family Scarabaeidae, not because I'm a @ucdavis faculty of course."
According to Legacy.com, all of McNeil's t-shirts will be "catalogued and sold to raise money for charity."
Jeremy Nichol McNeil would have loved that--but maybe not quite as much as he loved entomology and inspiring others to learn about insect science.
- Author: Michael Hsu
Quickly planting trees after wildfires crucial for communities, ecosystems, carbon goals
As the climate crisis fuels more high-severity wildfires, many forests – adapted to bounce back from frequent but less-intense fires – are struggling to recover quickly.
“In a lot of locations, forests in the Sierra Nevada that burn at high severity are not regenerating on their own,” said Susie Kocher, University of California Cooperative Extension forestry and natural resources advisor for the Central Sierra. “They need to have living trees to drop seeds; if everything dies in an intense fire, then there's a high likelihood in those locations that trees might not return for a while.”
According to Kocher, a forest may take multiple decades to grow back on its own, seeding in very slowly from the edges of a burn. To speed up that regeneration process, a pilot program of local “Emergency Forest Restoration Teams,” or EFRTs, have been helping forest landowners rapidly remove dead trees, plant new seedlings and expedite other vital tasks after wildfires.
Kocher is a co-author of a recently released report evaluating the EFRTs, which appear to be effective in assisting often-overwhelmed private landowners navigate competitive funding programs and complicated permitting pathways after wildfire. Small private landowners in California own 7 million acres, comprising 22% of forested land across the state.
“None of our current assistance programs were really designed to rapidly respond to high-severity fire disasters,” Kocher said. “And we're just getting so much more high-severity fire now that there needed to be a different way of helping people, besides business as usual.”
Lead agencies improve coordination of restoration efforts
Drawing from a successful model in Washington, Kocher and other members of the Governor's Forest Management Task Force recommended the formation of EFRTs in 2019 and this recommendation made it into the California Wildfire and Forest Resilience Action Plan of 2021.
Following the Caldor, Dixie and Tamarack fires during that year, disaster relief funds from CAL FIRE and the U.S. Forest Service enabled the establishment of pilot EFRTs in each of the affected regions. A key innovation was designating a local lead agency to coordinate restoration efforts: the El Dorado Resource Conservation District (Caldor), the Feather River Resource Conservation District (Dixie) and Alpine County (Tamarack).
“The idea is that one well-established local agency gets the funds to carry out all the reforestation work,” Kocher said. “They find contractors for the landowners and plan and carry out all the work needed, including dead tree removal, site preparation and replanting; this helps it be more coordinated across the landscape and reduces competition for contractors.”
“Also, for most of that work, there's no cost to the landowner – which is a huge benefit to them, because these things can get really expensive, like many thousands of dollars an acre,” Kocher added.
Although there was an initial steep learning curve for the local lead agencies on the complexities of reforestation and the maze of required permits, they quickly executed a significant number of forest restoration treatments. Within two years, the three pilot teams had collectively completed over 2,500 acres of dead tree removal and 1,400 acres of conifer planting.
“The overwhelming benefit of the pilots was that a lot of work got done on the ground, that otherwise would not have been done – at least not in the timeframe that was made possible by the EFRTs,” said Daylin Wade, a UCCE staff research associate and co-author of the recent report, who synthesized feedback from interviews of professionals involved in the program.
Rapid reforestation better financially, ecologically
Both Wade and Kocher underscored how the EFRTs were crucial in completing restoration tasks in a timely manner. Removal of dead wood becomes trickier and more expensive over time, as the trees decay and are dangerous to cut down.
“A major accomplishment was getting trees out of there while it was both safe and economically viable to remove those trees – and getting trees in the ground before shrubs dominate the site,” Wade explained.
It's also imperative to quickly remove the dead trees to reduce the fuel load and minimize the chances of re-burn in the area.
“If you're not doing this work, then you're actually endangering the investment that you're putting into rebuilding communities that burned, because they're in danger of burning again if you have huge piles of dead trees everywhere,” Kocher said.
Furthermore, expediting those tasks helps restore the forest cover that is crucial for sequestering carbon and achieving the goals of California's sweeping climate action plan – such as attaining carbon neutrality by 2045.
“We have very ambitious carbon goals for our forests in California, and so reestablishing them – even on private lands – is a public benefit,” Kocher said.
Evaluation of EFRTs by UC Cooperative Extension continues
In addition to enumerating the progress of the three EFRT case studies, the evaluation report also lists recommendations to further enhance the program, such as securing rapid and flexible funding for future EFRTs, improving guidance for local lead agencies and streamlining permitting processes.
The authors also stressed the need to expand opportunities for the commercial sale of woody material in the aftermath of a wildfire event. Selling logs and wood chips reduces the volume of material that would need to processed onsite by the EFRTs and their contractors, thereby defraying some of the costs for that work.
But there simply hasn't been a sufficient market for that woody biomass.
“It's a big barrier,” Kocher said. “If we had a healthier timber market, it would be easier to make this stuff pay its own way and be less of a subsidized endeavor.”
UC Cooperative Extension's EFRT evaluation work – made possible by funding from the U.S. Forest Service State, Private and Tribal Forestry, Region 5 – will continue for the next couple years. On the heels of this first report, Wade will next gather and summarize feedback from private landowners on whether the EFRTs are meeting their goals.
And, later this summer and fall, researchers will begin assessing the ecological success of the plantings in the restoration areas, surveying seedling survival and gauging the volume of competing vegetation.
“It's hugely encouraging that we've gotten all these trees in the ground, but it's not the end of the process – it's just the beginning,” Kocher said. “Trees and forests need to be maintained over time, so this next step will let us see how successful that has been, and if there are additional steps needed to actually ensure that these trees succeed and thrive.”
The full report, dedicated to the memory of report co-author and UCCE advisor Ryan Tompkins, can be found at https://ucanr.edu/efrt.
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