| The house fly, Musca domestica, is a major pest around dairy cattle operations and serve as a vector of harmful pathogens. House flies were collected from four Central Texas dairies from May until October 2007 and tested for insecticide susceptibility, using a bioassay method to replicate insecticide exposure. Tests were conducted to determine susceptibility to three insecticides, cyfluthrin, spinosad, and imidacloprid, on wood and vinyl with 2 h and 24 h mortality rates recorded. Within this study, cyfluthrin showed to produce the greatest house fly mortality on wood and on vinyl during 2 h observations. Spinosad produced the greatest mortality rate on wood and on vinyl during 24 h observations. Imidacloprid resulted in the lowest mortality on both wood and vinyl. |
