Insecticide resistance of house fly, Musca domestica (L.) from Argentina

Abstract

The status of resistance to cyromazine, 2,2-dichlorovinyl dimethyl phosphate (DDVP), and permethrinrelative to field populations of the house fly, Musca domesticaL. from Argentinean poultry farms was studied. All the threestudied populations (SV, Q, and C) showed resistant ratios(RRs) to cyromazine of 3.9, 10.98, and 62.5, respectively.We observed high levels of resistance toward the organophosphateDDVP and permethrin. The RRs to DDVP rangedfrom 45.4 to 62.5. No significant differences were foundamong the studied populations. All the house fly populationswere permethrin-resistant, in comparison with the susceptiblestrain. Two of the analyzed populations (SV and Q) differedsignificantly in toxicity to the population C. This is the firstevidence that house flies from Argentina showed a multiresistancepattern. The implementation of an insecticidemonitoring program on poultry farms of Argentina is neededto prevent field control failures. Furthermore, integratedcontrol strategies are needed to delay detrimental developmentof insecticide resistance.