Kathleen Knight, PhD

Treesearch Publications

• Mary E. Mason, Dave Carey, Jeanne Romero-Severson, Kathleen Knight, Therese M. M. Poland, Jennifer Koch. 2026. Select genotypes of white and green ash show heritable, elevated resistance to emerald ash borer
• Kelly L F Oten, Abigail R Ratcliff, Delaney L Serpan, Haley N Marcum, Kathleen Knight. 2025. Expanded geographic range and novel host association of elm zigzag sawfly (Hymenoptera: Argidae) with Zelkova serrata in North America
• John Butnor, Cornelia Wilson, Melike Bakır, Anthony W. D’Amato, Charles E. Flower, Christopher F. Hansen, Stephen R. Keller, Kathleen Knight, Paula Murakami. 2024. Cold Tolerance Assay Reveals Evidence of Climate Adaptation Among American Elm (Ulmus americana L.) Genotypes
• Kathleen Knight, Charles E. Flower, Jason S. Kilgore, Alejandro A. Royo, Timothy Fox, Rachel H. Kappler, Brian M. Hoven, Joshua Wigal, Jordan D. Bernard, Robert P. Long. 2023. Ash tree decline and mortality in Ohio and the Allegheny National Forest in Pennsylvania
• Therese M. M. Poland, Jennifer Koch, Kathleen Knight, Dave Carey, Mary E. Mason, Toby R. Petrice. 2022. Emerald ash borer adult feeding preferences and larval performance on susceptible and ‘lingering’ ash tree selections
• Brian M. Hoven, Kathleen Knight, Valerie E. Peters, David L. Gorchov. 2022. Woody seedling community responses to deer herbivory, introduced shrubs, and ash mortality depend on canopy competition and site wetness
• Samuel P. Reed, Alejandro A. Royo, Alexander T. Fotis, Kathleen Knight, Charles E. Flower, Peter S. Curtis. 2022. The long‐term impacts of deer herbivory in determining temperate forest stand and canopy structural complexity
• Eyyüb Y. Kıbış, İ Esra Büyüktahtakın, Robert G. Haight, Najmaddin Akhundov, Kathleen Knight, Charles E. Flower. 2021. A Multistage Stochastic Programming Approach to the Optimal Surveillance and Control of the Emerald Ash Borer in Cities
• G. Schrader, R. Baker, Y. Baranchikov, L. Dumouchel, Kathleen Knight, D. G. McCullough, M. J. Orlova‐Bienkowskaja, S. Pasquali, G. Gilioli. 2021. How does the Emerald Ash Borer (Agrilus planipennis) affect ecosystem services and biodiversity components in invaded areas?
• R.H. Kappler, Kathleen Knight, R. Bienemann, K.V. Root. 2020. Recovery potential for a green ash floodplain forest using various emerald ash borer management strategies in a population viability analysis
• Charles E. Flower, Cornelia Wilson, Kathleen Knight, Keith Woeste, James M. Slavicek. 2020. Back from the Brink: Forest Service Efforts to Create Dutch Elm Disease Tolerant Trees for Use in Urban and Rural Restoration
• Kathleen Knight, Rachel H. Kappler, Karen V Root, Jennifer Koch, Charles E. Flower. 2020. Monitoring of Ash Mortality Patterns Informs Emerald Ash Borer (EAB) Resistance Breeding Efforts: Integrated Pest Management for EAB
• Jennifer Koch, David W. Carey, Mary E. Mason, Jeanne Romero-Severson, Therese M. M. Poland, Kathleen Knight, Charles Tubesing, Roger Gettig. 2020. Restoring Green Ash (Fraxinus pennsylvanica): Breeding for Resistance to the Emerald Ash Borer (Agrilus planipennis)
• Brian M. Hoven, Kathleen Knight, Valerie E. Peters, David L. Gorchov. 2020. Release and suppression: forest layer responses to emerald ash borer (Agrilus planipennis)-caused ash death
• R.H. Kappler, Kathleen Knight, K.V. Root. 2019. Evaluating the population viability of green ash trees (Fraxinus pennsylvanica) before and after the emerald ash borer beetle (Agrilus planipennis) invasion
• Kim C. Steiner, Lake E. Graboski, Kathleen Knight, Jennifer Koch, Mary E. Mason. 2019. Genetic, spatial, and temporal aspects of decline and mortality in a Fraxinus provenance test following invasion by the emerald ash borer
• Andrzej M. Jagodziński, Marcin K. Dyderski, Paweł Horodecki, Kathleen Knight, Katarzyna Rawlik, Janusz Szmyt. 2019. Light and propagule pressure affect invasion intensity of Prunus serotina in a 14-tree species forest common garden experiment
• Kathleen Knight, Charles E. Flower, Mark D. D. Nelson. 2019. A Forest Death in Three Acts: From Woodpeckers to Water, the Emerald Ash Borer's Effects are Widespread
• Rachel Kappler, Kathleen Knight, Jennifer Koch, Karen Root. 2018. Neighboring Tree Effects and Soil Nutrient Associations with Surviving Green Ash (Fraxinus pennsylvanica) in an Emerald Ash Borer (Agrilus planipennis) Infested Floodplain Forest
• Charles E. Flower, Douglas J. Lynch, Kathleen Knight, Miquel A.  Gonzalez-Meler. 2018. Biotic and Abiotic Drivers of Sap Flux in Mature Green Ash Trees (Fraxinus pennsylvanica) Experiencing Varying Levels of Emerald Ash Borer (Agrilus planipennis) Infestation
• Charles E. Flower, Jeremie Fant, Sean Hoban, Kathleen Knight, Laura Steger, Elijah Aubihl, Miquel Gonzalez-Meler, Stephen Forry, Andrea Hille, Alejandro A. Royo. 2018. Optimizing conservation strategies for a threatened tree species: In situ conservation of white ash (Fraxinus americana L.) genetic diversity through insecticide treatment
• Michael P. Ricketts, Charles E. Flower, Kathleen Knight, Miquel A. Gonzalez-Meler. 2018. Evidence of Ash Tree (Fraxinus spp.) Specific Associations with Soil Bacterial Community Structure and Functional Capacity
• Brian M. Hoven, David L. Gorchov, Kathleen Knight, Valerie E. Peters. 2017. The effect of emerald ash borer-caused tree mortality on the invasive shrub Amur honeysuckle and their combined effects on tree and shrub seedlings
• Matt Higham, Brian M. Hoven, David L. Gorchov, Kathleen Knight. 2017. Patterns of Coarse Woody Debris in Hardwood Forests across a Chronosequence of Ash Mortality Due to the Emerald Ash Borer (Agrilus planipennis)
• Charles E. Flower, Elijah Aubihl, Jeremie Fant, Stephen Forry, Andrea Hille, Kathleen Knight, William K. Oldland, Alejandro A. Royo, Richard M. Turcotte. 2017. In-situ genetic conservation of white ash (Fraxinus americana) at the Allegheny national forest
• Cornelia Wilson, Charles E. Flower, Kathleen Knight, C. Marks, Rakesh Minocha, D. Lesser, Keith Woeste, Paul Schaberg, B. Baldwin, D.M. Delatte, Timothy Fox, Nancy L. Hayes-Plazolles, B. Held, Kirsten Lehtoma, Stephanie Long, S. Mattix, A. Sipes, J.M. Slavicek. 2017. Development of new Dutch Elm disease-tolerant selections for restoration of the American Elm in urban and forested landscapes
• Kathleen Knight, Linda Haugen, Cornelia Wilson, Paul Schaberg, Jim Slavicek. 2017. American elm (Ulmus americana) in restoration plantings: a review
• Cornelia Wilson, Kathleen Knight, Linda Haugen, Charles E. Flower, Jim Slavicek. 2017. Proceedings of the American elm restoration workshop 2016
• K.C. Costilow, Kathleen Knight, Charles E. Flower. 2017. Disturbance severity and canopy position control the radial growth response of maple trees (Acer spp.) in forests of northwest Ohio impacted by emerald ash borer (Agrilus planipennis)
• Charles E. Flower, Jennifer E. Dalton, Kathleen Knight, Marie Brikha, Miquel A. Gonzalez-Meler. 2015. To treat or not to treat: Diminishing effectiveness of emamectin benzoate tree injections in ash trees heavily infested by emerald ash borer
• Louis Iverson, Kathleen Knight, Anantha M. Prasad, Daniel A. Herms, Stephen Matthews, Matthew Peters, Annemarie Smith, Diane M. Hartzler, Robert P. Long, John Almendinger. 2015. Potential species replacements for black ash (Fraxinus nigra) at the confluence of two threats: Emerald ash borer and a changing climate
• D.A. Herms, D. Cipollini, Kathleen Knight, Jennifer Koch, Therese M. M. Poland, C.M. Rigsby, J.G.A. Whitehill, P. Bonello. 2015. The quest for ash resistance to emerald ash borer: Towards a mechanistic understanding
• Jennifer Koch, Dave Carey, Mary E. Mason, Therese M. M. Poland, Kathleen Knight. 2015. Intraspecific variation in Fraxinus pennsylvanica responses to emerald ash borer (Agrilus planipennis)
• Kathleen Knight, Alejandro A. Royo. 2014. Chapter 13 - Searching high and low: Patterns of White Ash health across topographic gradients in the Allegheny region (Project NE-EM-09-02)
• Charles E. Flower, Lawrence C. Long, Kathleen Knight, Joanne Rebbeck, Joel S. Brown, Miquel A. Gonzalez-Meler, Christopher J. Whelan. 2014. Native bark-foraging birds preferentially forage in infected ash (Fraxinus spp.) and prove effective predators of the invasive emerald ash borer (Agrilus planipennis Fairmaire)
• Kathleen Knight, Britton P. Flash, Rachel H. Kappler, Joel A. Throckmorton, Bernadette Grafton, Charles E. Flower. 2014. Monitoring ash (Fraxinus spp.) decline and emerald ash borer (Agrilus planipennis) symptoms in infested areas
• Kathleen Knight. 2014. Outlook for ash in your forest: results of emerald ash borer research and implications for management
• Charles E. Flower, Kathleen Knight, Joanne Rebbeck, Miquel A. Gonzalez-Meler. 2013. The relationship between the emerald ash borer (Agrilus planipennis) and ash (Fraxinus spp.) tree decline: Using visual canopy condition assessments and leaf isotope measurements to assess pest damage
• Charles E. Flower, Kathleen Knight, Miquel Gonzalez-Meler. 2013. Impacts of the emerald ash borer (Agrilus planipennis Fairmaire) induced ash (Fraxinus spp.) mortality on forest carbon cycling and successional dynamics in the eastern United States
• Kathleen Knight, John Brown, Robert P. Long. 2013. Factors affecting the survival of ash (Fraxinus spp.) trees infested by emerald ash borer (Agrilus planipennis)
• Jim Slavicek, Kathleen Knight. 2012. Generation of American elm trees with tolerance to Dutch elm disease through controlled crosses and selection
• Kathleen Knight, Jim Slavicek, Rachel Kappler, Elizabeth Pisarczyk, Bernadette Wiggin, Karen Menard. 2012. Using Dutch elm disease-tolerant elm to restore floodplains impacted by emerald ash borer
• Jennifer Koch, David W. Carey, Kathleen Knight, Therese M. M. Poland, Daniel A. Herms, Mary E. Mason. 2012. Breeding strategies for the development of emerald ash borer - resistant North American ash
• Kathleen Knight, Daniel Herms, Reid Plumb, Eileen Sawyer, Daniel Spalink, Elizabeth Pisarczyk, Bernadette Wiggin, Rachel Kappler, Emily Ziegler, Karen Menard. 2012. Dynamics of surviving ash (Fraxinus spp.) populations in areas long infested by emerald ash borer (Agrilus planipennis)
• Alejandro A. Royo, Kathleen Knight. 2012. White ash (Fraxinus americana) decline and mortality: the role of site nutrition and stress history
• Alejandro A. Royo, Kathleen Knight, Jamie M. Himes, Ashley N. Will. 2012. White ash (Fraxinus americana) health in the Allegheny plateau region, Pennsylvania: Evaluating the relationship between FIA phase 3 crown variables and a categorical rating system
• Louis Iverson, Anantha M. Prasad, Kathleen Knight, Daniel A. Herms, Stephen Matthews, Matthew Peters, Annemarie Smith, Robert P. Long. 2011. Potential replacements for northwoods black ash in a changing climate: the confluence of two challenges
• Charles E. Flower, Douglas J. Lynch, Kathleen Knight, Miquel A. Gonzales-Meler. 2011. EAB induced tree mortality impacts ecosystem respiration and tree water use in an experimental forest
• Jennifer Koch, Kathleen Knight, Therese M. M. Poland, Dave Carey, Daniel A. Herms, Mary E. Mason. 2011. Strategies for selecting and breeding EAB-resistant ash
• Mary E. Mason, Daniel A. Herms, Dave Carey, Kathleen Knight, Nurul Islam-Faridi, Jennifer Koch. 2011. Update on exotic ash collection for hybrid breeding and survey for EAB-resistance in native North American species
• Kathleen Knight, Daniel A. Herms, John Cardina, Robert P. Long, Kamal J.K. Gandhi, Catharine P. Herms. 2011. Emerald ash borer aftermath forests: the future of ash ecosystems
• Jennifer Koch, Mary E. Mason, Dave Carey, Kathleen Knight, Therese M. M. Poland, Daniel A. Herms. 2010. Survey for tolerance to emerald ash borer within North American ash species
• Kathleen Knight, Daniel A. Herms, John Cardina, Robert P. Long, Joanne Rebbeck, Kamal J.K. Gandhi, Annemarie Smith, Wendy S. Klooster, Catherine P. Herms, Alejandro A. Royo. 2010. Emerald ash borer aftermath forests: The dynamics of ash mortality and the responses of other plant species
• Kathleen Knight. 2010. Ash seed collection: slingshot method
• Robert R. Kula, Kathleen Knight, Joanne Rebbeck, Leah Bauer, David L. Cappaert, Kamal J.K. Gandhi. 2010. Leluthia astigma (Ashmead) (Hymenoptera: Braconidae: Doryctinae) as a parasitoid of Agrilus planipennis Fairmaire (Coleoptera: Buprestidae: Agrilinae), with an assessment of host associations for nearctic species of Leluthia Cameron.
• Kathleen Knight, Robert P. Long, Joanne Rebbeck, Daniel A. Herms, John Cardina, Catherine P. Herms, Kamal J.K. Gandhi, Annemarie Smith, Kyle C. Costilow, Lawrence C. Long, David L. Cappaert. 2010. Effects of emerald ash borer (Agrilus planipennis) on forest ecosystems
• Kathleen Knight, Robert P. Karrfalt, Mary E. Mason. 2010. Methods for collecting ash (Fraxinus spp.) seeds
• Daniel A. Herms, Kamal J.K. Gandhi, Annemarie Smith, John Cardina, Kathleen Knight, Catherine P. Herms, Robert P. Long, Deborah G. McCullough. 2009. Ecological impacts of emerald ash borer in forests of southeast Michigan
• Kathleen Knight, Jacek Oleksyn, Andrzej M. Jagodzinski, Peter B. Reich, Marek Kasprowicz. 2008. Overstorey tree species regulate colonization by native and exotic plants: a source of positive relationships between understorey diversity and invasibility
• Kathleen Knight, Robert P. Long, Joanne Rebbeck, Annemarie Smith, Kamal Gandhi, Daniel A. Herms. 2008. How fast will trees die? A transition matrix model of ash decline in forest stands infested by emerald ash borer
• Kathleen Knight, Robert P. Long, Joanne Rebbeck. 2007. Predicting emerald ash borer-induced changes in forest tree species composition

• Program
  

  Hardwood Tree Improvement and Regeneration Center

  https://research.fs.usda.gov/nrs/programs/htirc
  Station

  Northern Research Station
• Project
  

  Strategies to Manage the Loss of Ash and Elm Trees

  https://research.fs.usda.gov/nrs/projects/ashelmloss
  Station

  Northern Research Station

Multimedia

• Podcast
  

  Forestcast - Season 2: Backcross - Episode 5: Will Ash be the Blueprint for Tree Restoration?

  https://research.fs.usda.gov/nrs/products/multimedia/podcasts/forestcast-season-2-backcross-episode-5-will-ash-be-blueprint-tree
• Podcast
  

  Forestcast Season 2: Backcross - Episode 4: A Return to Elm Street

  https://research.fs.usda.gov/nrs/products/multimedia/podcasts/forestcast-season-2-backcross-episode-4-return-elm-street
• Podcast
  

  Forestcast Season 2: Backcross - Episode 1: Tree Species Restoration & Resistance Breeding

  https://research.fs.usda.gov/nrs/products/multimedia/podcasts/forestcast-season-2-backcross-episode-1-tree-species-restoration

• University of Minnesota Ph.D., Ph.D., Ecology, Evolution, and Behavior, 2006
• Hiram College, B.A., Biology and Music Performance, 2001