- Author: Kathy Keatley Garvey
The paper appears in the current edition of Journal of Hydrobiologia.
“The water hyacinth, Eichhornia crassipes, is considered the world's most economically damaging aquatic weed,” said author Emily Bick, a UC Davis alumnus and a postdoctoral scholar at the University of Copenhagen, Denmark.
The free-floating perennial, native to the Amazon region of South America, is highly invasive throughout the world. It forms large floating mats when its roots and leaves intertwine. The aquatic weed is a major issue in the Sacramento-San Joaquin Delta in central California.
“This paper is the result of my first dissertation chapter,” said Bick, an agricultural entomologist who received both her master's degree (2017) and doctorate in entomology (2019) from UC Davis. “We aimed to determine if salinity was the reason N. bruchi was not effective at regulating the weed in the Sacramento-San Joaquin Delta compared with other worldwide locations. The results were not as clear cut as we hoped, as the study was limited in testing only adult weevils. However, the paper makes the case for including salinity as a screening variable for new biological control agents that are candidates for release in the Delta and other partially saline areas. Also, given the thoroughness of the experiments, there is at least one cool modeling paper to come out as a follow-up.”
All-Hands-on-Deck
The paper, titled “Effects of Salinity and Nutrients on Water Hyacinth and its Biological Control Agent, Neochetina bruchi, “was truly an all-hands-on-deck effort,” Bick said. "Specifically, a major project hurdle was the temperature in Davis."
She related that the greenhouse experiments on water hyacinth “weren't producing consistent results due to the high variation—and high heat--in water temperature.” So fellow scientists Danny Klittich, then a UC Davis doctoral student in entomology with the Michael Parrella laboratory, and Bob Starnes, then UC Davis senior superintendent of agriculture, built a giant water bath out of a leftover evaporative cooler from the Michael Parrella lab.
Klittich is now the California Central Coast Agronomist with Redox Chemicals and chief executive officer and founder at HowToGrowRoses.org. Starnes is vice president of agriculture for UAV-IQ (Unmanned Aerial Vehicle Intelligence.
In addition to Klittich and Starnes, other co-authors are UC Davis postdoctoral scholar Elvira deLange of the Christian Nansen lab; then doctoral student Cindy Kron of the Frank Zalom laboratory; and undergraduate students Jessie Liu and Derrick Nguyen. Kron, now with UC Cooperative Extension, is the North Coast Area Integrated Pest Management (IPM) Advisor, serving Sonoma, Napa, Mendocino and Lake counties.
The Abstract
“Water hyacinth, Eichhornia crassipes (Mart.) Solms (Commelinales: Pontederiaceae), is an important aquatic weed worldwide. Previous studies demonstrate that releases of Neochetina bruchi Hustache (Coleoptera: Curculionidae) provide biological control in many locations, but not all. Notably, N. bruchi were unsuccessful at regulating water hyacinth in tidal brackish waters. Abiotic factors, including salinity and nutrients, affect water hyacinth growth, but little is known about the impact of salinity on weevil survival. We hypothesized that N. bruchi has a relatively low salinity tolerance. In a mesocosm experiment, we assessed weed growth in response to a range of salinity and nutrient concentrations. In a laboratory, we assessed adult N. bruchi mortality in response to various salinity concentrations. Results indicate that increasing nutrient concentration increases weed growth. When both nutrient and salinity levels were varied, nutrients increased leaf count, but not biomass, while salinity reduced growth and increased mortality. Increasing salinity concentrations increased adult weevil mortality; required concentrations were higher than that for weeds. Thus, these results did not provide support for the suggested hypothesis. Potential effects of salinity via other exposures to weevils need to be investigated. Elucidating abiotic factors important for weed growth and weevil survival may increase effectiveness of water hyacinth management practices.”
The water hyacinth was introduced in California in 1904. Scientists trace its history in the United States back to 1884 at the New Orleans Exposition. “Samples are said to have been given to fair-goers, and within 4 years, coastal fresh waters were infested from Texas to Alabama. By 1972, the infestation in Florida was estimated to be 200,000 acres,” according to Cornell University. “Large, floating mats of waterhyacinth obstruct navigation, clog irrigation works, disrupt the natural ecology of wetlands in many ways, exacerbate mosquito problems, and are costly to the tourism and recreation industries.”
Two biocontrol agents, weevils N. eichhorniae and N. bruchi, natives of Argentina, and surrounding areas in South America, were released in 1972 and 1974, respectively.
- Author: Kathy Keatley Garvey
Agricultural entomologist Emily Bick is targeting you.
Lygus hesperus, a serious pest of strawberries--as well as cotton, and seed crops such as alfalfa--causes an estimated $40 million in annual losses to California's strawberry industry.
Bick, who received her doctorate in entomology last year from UC Davis and is now a postdoctoral fellow at the University of Copenhagen, is a newly selected recipient of an American Association of University Women (AAUW) American Publishing Grant and her subject is the lygus bug immigration and aggregation in California strawberries.
The $6000 grant is designed to support women over a two-month period in the summer as they prepare a solo-authored manuscript.
Bick's application focused on her scientific modeling work that originated from her Ph.D. program. Her application detailed the academic women who supported her career, including one of her mentors, Cornell University entomology professor Laura Harrington. Additionally, women students she mentored while at UC Davis provided letters of support.
“Prior to receiving this good news, my fiancé, Nora Forbes, and I decided to get married in the historic home of the AAUW in St. Paul, Minn.,” Bick said. “We are both aware of AAUW's legacy of supporting women in their academic pursuits since 1881 and wanted to celebrate in a location in line with their pioneering vision.” Forbes is a statistician at the Danish Medtronic office.
Earlier this year, Bick received a $23,000 fellowship from the American Scandinavian Foundation for her proposal, "Designing Pest-Resilient Apple Orchards Using Bespoke Models." The project will start immediately following the AAUW grant.
As a postdoctoral fellow at the University of Copenhagen, the UC Davis alumnus is a member of Professor Lene Sigsgaard's research team. She received a $244,000 postdoctoral grant from the Danish Innovations Fund to estimate insect population dynamics in relation to FaunaPhotonics's LIDAR insect sensor. LIDAR stands for light detection and ranging.
Emily's entomological journey began at Cornell University, where she received her bachelor's degree in entomology in 2013. She then received two degrees in entomology from UC Davis: her master's degree in 2017 and her doctorate in 2019.
Bick, who specializes in integrated pest management, helped anchor the UC Davis Department of Entomology and Nematology's Linnaean Games Team that won the national championship at the Entomological Society of America (ESA) meeting in 2016, and the University of California (UC Davis and UC Berkeley) Linnaean Games Team that won the national championship in 2018. The Linnaean Games, launched in 1983, are lively question-and-answer, college bowl-style competitions on entomological facts and played by winners of the ESA branch competitions. The teams score points by correctly answering random questions. (Watch the championship game on YouTube).
While at UC Davis, Bick served as vice president of the UC Davis Entomology Graduate Student Association (EGSA). ESA honored her as a Board-Certified Entomologist in 2014, and the Student Certification Award in 2018. She served as an emergency medical technician from 2008 to 2017.
- Author: Kathy Keatley Garvey
Bick, an agricultural entomologist who received her doctorate in entomology in June 2019 from UC Davis and then headed for the University of Copenhagen for her postdoctoral fellowship, has just received a $23,000 fellowship from the American Scandinavian Foundation for her proposal, "Designing Pest-Resilient Apple Orchards Using Bespoke Models."
This stipend will help support one year of living expenses while she pursues ecological modeling at University of Copenhagen.
She will be leveraging Professor Lene Sigsgaard's apple orchard data and aiming to add spatial capability to Professor Neils Holst's Universal Simulator. Both professors are supervising the grant.
The abstract of the proposal:
“This proposal aspires to address civilization's greatest challenge: sustainably feeding our global population. Approaching agricultural food production as an ecosystem rather than an industrial process allows for greater sustainability. This systems approach allows farmers to sustainably intensify their agroecosystem using the tool with the greatest impact: redesign. Models can be used to pre-screen designs for optimal pest management. I propose using modelling to design pest-resilient apple orchards. Specifically, the proposal focuses on the combination of pest-attractant crops (Trap Crops), increasing plant diversity (Dilution Effects) for masking crops from pests, and using diverse crops to support natural enemies (Natural Enemy Effects). The combination of modelling and orchard design could result sustainably intensifying apple production in Europe.”
She earlier received a $244,000 postdoc grant from the Innovations Fund in Denmark. (See Bug Squad)
Emily's entomological journey began at Cornell University, where she received her bachelor's degree in entomology in 2013. She then received two degrees in entomology from UC Davis: her master's degree in 2017 and her doctorate in 2019.
Bick, who specializes in integrated pest management, helped anchor the UC Davis Department of Entomology and Nematology Linnaean Games Team that won the national championship at the ESA meeting in 2016, and the University of California (UC Davis and UC Berkeley) Linnaean Games Team that won the national championship in 2018. The Linnaean Games, launched in 1983, are lively question-and-answer, college bowl-style competitions on entomological facts and played by winners of the ESA branch competitions. The teams score points by correctly answering random questions. (Watch the championship game on YouTube). She also served as vice president of the UC Davis Entomology Graduate Student Association (EGSA).
Bick served as an emergency medical technician from 2008 to 2017 and gained her pesticide applicator's license in 2013. She was singled out to receive the Student Certification Award at the Entomological Society of America (ESA) meeting in 2018. In 2014, she was named a Board-Certified Entomologist, a honor bestowed on her at the ESA meeting.
/span>- Author: Kathy Keatley Garvey
Bick, who received her doctorate in entomology at UC Davis in June and then headed to Denmark in August for a postdoctoral position at the University of Copenhagen, just received word that she's the recipient of a $244,000 postdoc grant from the Innovations Fund in Denmark.
Bick, who specializes in integrated pest management (IPM), received the funding for her proposal, "Optimization of Agricultural Pest Management Strategies by Combining Modeling and Digital Insect Monitoring."
"I'm excited to be working at the University of Copenhagen and partnering with digital agriculture company FaunaPhotonics integrating modeling and LIDAR detection of insects for the next two years!" she said.
Emily's entomological journey began at Cornell University, where she received her bachelor's degree in entomology in 2013. Then she crossed the country to UC Davis for her master's degree in entomology (2017), followed by her doctorate.
Her accomplishments and accolades are many. She served as an emergency medical technician from 2008 to 2017 and gained her pesticide applicator's license in 2013. She was singled out to receive the Student Certification Award at the Entomological Society of America (ESA) meeting in 2018. In 2014, she was named a Board-Certified Entomologist, a honor bestowed on her at the ESA meeting.
Emily helped anchor the UC Davis Linnaean Games Team that won the national championship at the ESA meeting in 2016, and the University of California (UC Davis and UC Berkeley) Linnaean Games Team that won the national championship again in 2018. The Linnaean Games, launched in 1983, are lively question-and-answer, college bowl-style competitions on entomological facts and played by winners of the ESA branch competitions. The teams score points by correctly answering random questions. (Watch the championship game on YouTube)
She also served as vice president of the UC Davis Entomology Graduate Student Association (EGSA).
Congratulations, UC Davis alumnus Emily Bick!
- Author: Kathy Keatley Garvey
How fast time passes.
Bick will present her exit seminar at 3 p.m., Monday, Aug. 5 in Room 158 of Briggs Hall. Her topic: "Evaluating the Relative Importance of Mechanisms for Diverse Plant Use in Agroecosystem Herbivore Mitigation: an Example in California Strawberries."
"As pest management strategies shift away from agrochemical use, practitioners aim to implement more ecologically friendly practices," Bick writes in her abstract. "One such practice uses diverse crops placed in an agroecosystem to mitigate pest damage. There are many possible mechanisms which facilitate this phenomenon. Knowing a diverse plant's mechanism(s) allows for more efficient field implementation."
"This presentation will evaluate the mechanism of the economic benefit of planting alfalfa in a California strawberry monoculture. Using a novel CO2 based sampling method, spatially explicit samples were taken at three sites over two years. We found that alfalfa did not act, as previously identified, a trap crop, but rather its presence actually increased natural enemies. This work serves as a framework for evaluation of the mechanism for use of diverse plants in agricultural landscapes."
Bick, who has accepted a postdoctoral position at the University of Copenhagen, specializes in integrated pest management (IPM). She received her bachelor's degree in entomology in 2013 from Cornell University, and her master's degree in entomology in 2017 from UC Davis. She joined the doctoral program in September 2015.
Bick served as an emergency medical technician from 2008 to 2017 and gained her pesticide applicator's license in 2013. She was singled out to receive the Student Certification Award at the Entomological Society of America (ESA) meeting in 2018. In 2014, she was named a Board-Certified Entomologist, a honor bestowed on her at the ESA meeting.
Bick helped anchor the UC Davis Linnaean Games Team that won the national championship at the ESA meeting in 2016, and the University of California (UC Davis and UC Berkeley) Linnaean Games Team that won the national championship again in 2018. (See Bug Squad blog.) The Linnaean Games, launched in 1983, are lively question-and-answer, college bowl-style competitions on entomological facts and played by winners of the ESA branch competitions. The teams score points by correctly answering random questions. (Watch the 2016 championship round on YouTube).
Bick was also active in the UC Davis Entomology Graduate Student Association (EGSA), serving as vice president.
A person of many talents, she wrote a highly praised review of the San Francisco-staged play, An Entomologist's Love Story, published in May of 2018 in Entomology Today. Tweeted the San Francisco Playhouse: “Quite possibly the coolest review we've ever received.”
In her review, Bick wrote that the play “shows that life imitates art and art imitates life, with insect mating rituals serving as a proxy for human dating behavior.”
“The well-known antagonistic insect mating behavior of bed bugs' traumatic insemination, praying mantids' sexual cannibalism, and honey bees' mating plugs are all accurately described and then used to represent adversarial (human) dating behavior. Fireflies' bioluminescence, meanwhile, is cast in a romantic light.”
“The play brims with entomological humor, from anthropomorphizing bed bugs to a running joke that sometimes volunteers actually make life harder for researchers,” Bick noted. “While the public will be entertained by the gross descriptions of entomological behavior (pun intended), only we insect scientists will know that the 'Lou' the protagonists keep referring to is actually Dr. Louis Sorkin of the American Museum of Natural History in New York City (and that, yes, he does keep a bed bug colony there). Or, for those of us who have been lucky enough to take a tour, you know the Museum's offices really are that difficult to get to.”
Now it's off to the historic University of Copenhagen for the next chapter of her entomological life. "I am moving to Copenhagen on Aug. 31 but moving out of Davis the week before," she says.
That would be as Dr. Emily Bick...entomologist extraordinaire.