Tracy Johnson, PhD

Treesearch Publications

• Sri Rahayu, Tracy Johnson. 2026. Biosecurity versus Biocontrol: The Impact of Uromycladium falcatarium on Pacific Mimosaceae
• Ryan L Perroy, Roberto Rodriguez, Tracy Johnson, Olivia Jarvis. 2025. Scaling up the deployment of Psidium cattleyanum biocontrol in a Tropical Forest
• Albert (Bud) E. Mayfield, Steven Seybold, Wendell R. Haag, Tracy Johnson, Becky K. Kerns, John Kilgo, Daniel Larkin, Rima Lucardi, Bruce Moltzan, Dean E. Pearson, John Rothlisberger, John Schardt, Michael K. Schwartz, Michael K. Young. 2021. Impacts of invasive species in terrestrial and aquatic systems in the United States.
• John M. Heraty, D. Valle Rogers, Tracy Johnson, William D. Perreira, Austin J. Baker, Ellyn Bitume, Elizabeth Murray, Laura Varone. 2021. New record in the Hawaiian Islands of Orasema minutissima (Hymenoptera: Eucharitidae), an ant-parasitic wasp and a potential biocontrol agent against the Little Fire Ant, Wasmannia auropunctata (Hymenoptera: Formicidae)
• Manuel Antonio Alfaro-Alpízar, Sjaak Koster, Tracy Johnson, Francisco Rubén. Badenes-Pérez. 2020. Description, Biology, and Impact of the Fruit-Feeding Moth, Mompha luteofascia sp. n. (Lepidoptera: Momphidae), on Miconia calvescens (Melastomataceae) in Costa Rica
• Carol C. Horvitz, Julie S. Denslow, Tracy Johnson, Orou Gaoue, Amanda L. Uowolo. 2018. Unexplained variability among spatial replicates in transient elasticity: implications for evolutionary ecology and management of invasive species
• Jomar M. Barbosa, Gregory P. Asner, Flint F. Hughes, Tracy Johnson. 2017. Landscape-scale GPP and carbon density inform patterns and impacts of an invasive tree across wet forests of Hawaii
• Tracy Johnson. 2016. Managing conflict over biological control: the case of strawberry guava in Hawaii
• Jomar Barbosa, Gregory Asner, Roberta Martin, Claire Baldeck, Flint F. Hughes, Tracy Johnson. 2016. Determining subcanopy Psidium cattleianum invasion in Hawaiian forests using imaging spectroscopy
• Alexander Castillo, Tracy Johnson, Francisco R. Badenes-Pérez. 2014. Biology, behavior, and larval morphology of Salbia lotanalis (Lepidoptera: Crambidae), a potential biological control agent of Miconia calvescens (Myrtales: Melastomataceae) from Costa Rica
• Francisco R. Badenes-Perez, Alexander Castillo, Tracy Johnson. 2014. Damage to Miconia calvescens and seasonal abundance of Salbia lotanalis (Lepidoptera: Crambidae) in Costa Rica
• Flint F. Hughes, Tracy Johnson, Amanda L. Uowolo. 2013. The invasive alien tree Falcataria moluccana: its impacts and management
• Yun Wu, Tracy Johnson, Sharlene E. Sing, S. Raghu, Greg Wheeler, Paul Pratt, Keith Warner, Ted Center, John Goolsby, Richard Reardon. 2013. Proceedings of the XIII International Symposium on Biological Control of Weeds; September 11-16, 2011; Waikoloa, Hawaii, USA
• P. Conant, J. N. Garcia, Tracy Johnson, W. T. Nagamine, C. K. Hirayama, G. P. Markin, R. L. Hill. 2013. Releases of natural enemies in Hawaii since 1980 for classical biological control of weeds
• Eduardo Chacón-Madrigal, Tracy Johnson, Paul Hanson. 2012. The life history and immature stages of the weevil Anthonomus monostigma Champion (Coleoptera: Curculiondidae) on Miconia calvescens DC (Melastomataceae)
• F.R. Badenes-Pérez, M.A. Alfaro-Alpízar, Tracy Johnson. 2010. Diversity, ecology and herbivory of hairstreak butterflies (Theclinae) associated with the velvet tree, Miconia calvescens in Costa Rica.
• E. Reichert, Tracy Johnson, E. Chacon, R.S. Anderson, T.A. Wheeler. 2010. Biology and host preferences of Cryptorhynchus melastomae (Coleoptera: Curculionidae), a possible biocontrol agent for Miconia calvescens (Melastomataceae) in Hawaii
• P. Hanson, K. Nishida, P. Allen, E Chacón, B. Reichert, A. Castillo, M. Alfaro, L. Madrigal, E. Rojas, F. Badenes-Perez, Tracy Johnson. 2010. Insects that feed on Miconia calvescens in Costa Rica
• Tracy Johnson. 2010. Miconia biocontrol: Where are we going and when will we get there?
• M. M. Ramadan, K. T. Murai, Tracy Johnson. 2010. Host range of Secusio extensa (Lepidoptera: Arctiidae), and potential for biological control of Senecio madagascariensis (Asteraceae)
• Tracy Johnson. 2008. Controlling strawberry guava’s invasion
• F. R. Badenes-Perez, Tracy Johnson. 2008. Biology, herbivory, and host specificity of Antiblemma leucocyma (Lepidoptera: Noctuidae) on Miconia calvescens DC. (Melastomataceae) in Brazil
• F.R. Badenes-Perez, M.S. Alfaro-Alpizar, A. Castillo-Castillo, Tracy Johnson. 2008. Biological control of Miconia calvescens with a suite of insect herbivores from Costa Rica and Brazil
• Jim Kling, Julie Featured: Denslow, Tracy Johnson, Susan Cordell. 2008. Repelling invaders: Hawaiian foresters use ecology to counter invasive species

• Program
  

  Institute of Pacific Islands Forestry (Pacific Zone – Hawaii and U.S. Affiliated Pacific Islands)

  https://research.fs.usda.gov/psw/programs/ipif
  Station

  Pacific Southwest Research Station
• Project
  

  Decision Support to Improve Ridge-to-Reef Stewardship in an Era of Rapid Global Change

  https://research.fs.usda.gov/psw/projects/hawaii-dst
  Station

  Pacific Southwest Research Station
• Project
  

  Increasing understanding and capacity to manage and mitigate Ceratocystis-caused Rapid ʻŌhiʻa Death (ROD) across Hawai’i

  https://research.fs.usda.gov/psw/projects/rod-initiative
  Station

  Pacific Southwest Research Station

Other Publications

• Brochure
  

  Restoring Balance to Hawaii’s Forests: Biological Control of Invasive Plants

  https://research.fs.usda.gov/psw/understory/restoring-balance-hawaiis-forests-biological-control-invasive-plants

Multimedia

• Webinars

  Prospects for Biocontrol of Invasive Grasses

  https://research.fs.usda.gov/psw/products/multimedia/webinars/prospects-biocontrol-invasive-grasses
• Video

  Strawberry Guava Biocontrol in Hawaii

  https://research.fs.usda.gov/psw/products/multimedia/videos/strawberry-guava-biocontrol-hawaii

• North Carolina State University, Ph.D., Entomology, 1995
• North Carolina State University, M.S., Entomology, 1990
• University of California, A.B., Biology, 1984