Abstract
The house fly, Musca domestica L., is a vector for more than100 human and animal diseases and has the ability to developeresistance to different insecticides. This study evaluated toxicity ofCypermethrin, Imidacloprid and Spinosad, in addition to, their mixturesunder laboratory conditions against larvae and adults of M. domesticafor laboratory strain. The LC50s of the three tested insecticides were579.30, 415.46 and 16.32ppm, respectively, against larvae 48h posttreatment. The toxic effect of these insecticides against M. domesticaadults was assessed 24h post treatment. The LC50s of Cypermethrin,Imidacloprid and Spinosad were 208.75, 238.3 and 86.05 ppm,respectively, against the laboratory strain. This study also showedefficacy of the binary mixtures of these insecticides, where the mixtureof Cypermethrin+Imidacloprid and Cypermethrin+Spinosad showedpotentiation at ratios 1:1, 1:2 and 2:1. On other hand, the mixture ofImidaclporid+Spinosad showed an additive effect at all mixing ratios.
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