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Section Symposium

Medical, Urban, and Veterinary Entomology

Bugs, Barns, and Breakthroughs: Leveraging the past to Advance Livestock and Poultry Pest Control

Economic injury levels: A magic number or snake oil?

Tuesday, November 11, 2025
2:18 PM - 2:32 PM Pacific
Location: Oregon Convention Center, Portland Ballroom 255, OCC
Oral Presentation
Economic injury levels (EIL) were academically established for both stable and horn flies in the 1970’s and 80’s. It has been common practice to advocate that producers to wait to treat fly populations until they reach this limit in an effort to maximize economic gains and reduce insecticide pressure. Veterinary entomologists have long known that the EIL numbers do not capture the complexity of arthropod parasitism and discussions often focus on the need to ‘update the EIL’. This talk raises the question of if EIL is a useful concept for veterinary entomology and explores an alternative approach using producer driven questions and research.