Resistance Status of House Flies (Diptera: Muscidae) from Southeastern Nebraska Beef Cattle Feedlots to Selected Insecticides

Authors

Paula C.R.G. Marcon, University of Nebraska-Lincoln
Gustave D. Thomas, University of Nebraska-Lincoln
Blair D. Siegfried, University of Nebraska-LincolnFollow
John B. Campbell, University of Nebraska-LincolnFollow
Steven R. Skoda, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

June 2003

Comments

Published in Journal of Economic Entomology Volume 96, Issue 3 (June 2003) pp. 1016–1020. Copyright 2003 Entomological Society of America. Used by permission.

Abstract

The status of resistance to three insecticides (permethrin, stirofos, and methoxychlor), relative to a laboratory-susceptible colony, was evaluated in Þeld populations of house flies, Musca domestica L., collected from two beef cattle feedlots in southeastern Nebraska. Topical application and residual exposure to treated glass surfaces were suitable methods for determining the resistance status of house flies to permethrin, stirofos, or methoxychlor. However, in most cases, residual exposure was more sensitive in resistance detection (i.e., higher resistance ratios). The field populations tested were moderately resistant to permethrin (RR = 4.9-fold and RR = 7.3-fold, for topical application and residual exposure, respectively) and extremely resistant to stirofos and methoxychlor (not accurately quantifiable be cause of low mortality at the highest possible concentrations or doses). Probable explanations for the resistance status of these house fly populations and implications for global feedlot fly management are discussed.