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Biting Midges-Current Knowledge and Research Needs Symposium I

Biting Midges-Current Knowledge and Research Needs Symposium I

200 - Efficacy of multiple control strategies against Culicoides biting midges from Florida

Thursday, March 26, 2026

9:45 AM - 10:00 AM PDT

Location: B119

Presenter(s)

Vilma M. Cooper, PhD

R&D Entomologist
MGK Insect Control Solutions, Minnesota, United States

Co-Author(s)

EB

Eva Buckner, PhD

Assistant Professor and Extension Specialist
University of Florida, Florida, United States
NB

Nathan Burkett-Cadena, PhD (he/him/his)

Associate Professor
University of Florida, Florida, United States

Abstract: Culicoides biting midges (Diptera: Ceratopogonidae) are globally important vectors of arboviruses affecting humans, livestock, and wildlife. Despite their impact, Culicoides remain understudied, hindering the development of effective, targeted control strategies. This research evaluated multiple control approaches for Culicoides on Florida deer farms to inform integrated vector management (IVM). Laboratory bioassays using CDC bottle protocols demonstrated 100% mortality across seven Culicoides species following permethrin exposure, confirming current insecticide efficacy. Semi-field trials using mesh cages validated these results under more realistic conditions, while emphasizing the need for ongoing resistance surveillance to preserve long-term effectiveness. Field evaluations of permethrin-treated barriers and topical pour-on treatments revealed significant reductions in Culicoides landings on simulated deer. Treated barriers acted as both physical and chemical deterrents, while pour-ons provided direct protection to individual animals. These interventions offer practical, scalable solutions for reducing vector-host contact and potentially lowering transmission risk. Findings also highlighted a mismatch between peak midge activity, occurring between 2200 and 0230 hours, and the typical timing of ground-level adulticide applications, which are often conducted at dusk. Aligning control efforts with nocturnal activity patterns could improve efficacy. Together, these studies provide a foundation for science-based IVM strategies tailored to Culicoides ecology.