Erika T. Machtinger, Ph.D.

Erika T. Machtinger, Ph.D.

  • Assistant Professor of Entomology
4 Chemical Ecology Laboratory
University Park, PA 16802

Areas of Expertise

  • Veterinary Entomology
  • Tick ecology and control
  • Filth fly management and behavior
  • Wildlife entomology
  • Arthropod behavior


  • Postdoctoral Research Associate, USDA, ARS
  • Ph.D., Entomology, University of Florida
  • M. S., Entomology, University of Florida
  • B. S., Wildlife Conservation, University of Delaware


Machtinger Lab Website

Machtinger Lab Twitter

Machtinger Lab Facebook

Google Scholar

Graduate Students

Hannah Tiffin (Ph.D. student, Entomology)

Jessica Brown (Ph.D. student, Ecology)

Jesse Evans (MSc student, Entomology)

Postdoctoral Scholars

Karen Poh, Ph.D. (Post-doctoral Scholar)

Research Support

Arash Maleki (Research Technologist)

Anya Watts (Research Associate)

Baxter Bierbaum (Research Associate) 

Kylie Green (Research Associate) 

Zoey Cole (Research Associate) 

Anna-Marie Wise (Research Associate) 

Chloe Roberts (Research Associate)  


The mission of the Veterinary Entomology Laboratory is to investigate the ecological relationships between vertebrates and their ectoparasites and other arthropod pests to facilitate the development of control methods and integrated pest management strategies. We don't study a specific taxa or phenomenon but rather problems associated with non-human vertebrates. Of particular interest are filth flies affecting livestock, poultry, and equids and ticks and tick-borne disease ecology.


Toxicity of fluralaner, a companion animal insecticide, relative to industry-leading agricultural insecticides against resistant and susceptible strains of filth flies
Scientific reports, Burgess, Edwin R., Geden, Christopher J., Lohmeyer, Kimberly H., King, B. H., Machtinger, Erika T., Scott, Jeffrey G., 2020

Choice of laboratory tissue homogenizers matters when recovering nucleic acid from medically important ticks
Journal of medical entomology, Jones, Amanda M., Van De Wyngaerde, Marshall T., Machtinger, Erika T., Rajotte, Edwin G., Baker, Thomas C., 2020

Tick tubes reduce blacklegged tick burdens on white-footed mice in Pennsylvania, USA
Journal of Applied Entomology, Brown, Jessica E., Miller, Taylor M., Machtinger, Erika T., 2020

Host distribution and pathogen infection of fleas (Siphonaptera) recovered from small mammals in Pennsylvania
Journal of Vector Ecology, Fedele, Kaila, Poh, Karen C., Brown, Jessica E., Jones, Amanda, Durden, Lance A., Tiffin, Hannah S., Pagac, Alexandra, Li, Andrew Y., Machtinger, Erika T., 2020

Behavioral inhibition of the house fly (Diptera
Journal of economic entomology, Tuorinsky, Elizabeth V., Machtinger, Erika T., 2020

Tick Bite Risk and Tick-Borne Disease Perceptions of School District Administrators in the Mid-Atlantic United States
Journal of School Health, Machtinger, Erika T., Li, Andrew Y., Liu, Yifen, 2019

Development of nontarget wildlife exclusion devices for small mammal trap protection
Wildlife Society Bulletin, Roden-Reynolds, Patrick, Hummell, Grace, Machtinger, Erika, Li, Andrew Y., 2018

Repellencies and toxicities of five ant-derived defensive compounds against the lone star tick, amblyomma americanum (Acari
Applied Entomology and Zoology, Machtinger, Erika, Yang, Xiaolong, Chen, Jian, Li, Andrew Y., 2018

Effects of four commercial fungal formulations on mortality and sporulation in house flies (Musca domestica) and stable flies (Stomoxys calcitrans)
Medical and Veterinary Entomology, Weeks, E. N.I., Machtinger, E. T., Gezan, S. A., Kaufman, P. E., Geden, C. J., 2017

Manure preferences and postemergence learning of two filth fly parasitoids, spalangia cameroni and muscidifurax raptor (Hymenoptera: Pteromalidae)
PloS one, Taylor, Caitlin E., Machtinger, Erika T., Geden, Christopher J., Kramer, Matthew, 2016

House fly (Musca domestica) (Diptera
Biocontrol Science and Technology, Machtinger, Erika, Weeks, E. N.I., Geden, C. J., Kaufman, P. E., 2016

Impacts of extended laboratory rearing on female fitness in Florida colonies of the parasitoid Spalangia cameroni (Hymenoptera
Annals of the Entomological Society of America, Machtinger, Erika, Geden, C. J., LoVullo, E. D., Shirk, P. D., 2016

Oviposition deterrence and immature survival of filth flies (Diptera
Journal of Insect Science, Machtinger, E. T., Weeks, E. N.I., Geden, C. J., 2016

Use of pupal parasitoids as biological control agents of filth flies on equine facilities
Journal of Integrated Pest Management, Machtinger, Erika T., Geden, Christopher J., Kaufman, Phillip E., House, Amanda M., 2015

Development and oviposition preference of house flies and stable flies (Diptera: Muscidae) in six substrates from Florida equine facilities
Journal of medical entomology, Machtinger, E. T., Geden, C. J., Hogsette, J. A., Leppla, N. C., 2014

Host location by Spalangia cameroni (Hymenoptera: Pteromalidae) in equine associated substrates
Biological Control, Machtinger, Erika T., Geden, Christopher J., 2013