The aim of this study was to evaluate the efficiency of four antiparasitic for the Melophagus ovinus control in the XII Region, Chile. Two dipping and two endectocides were applied in groups of 200 sheared sheeps, realizing in series measurements of morbility and quantifying the parasites number's in ten individuals of every group. Significant differences there are in the parasites number's on the day 56 between the dipping groups and other groups. The parasites death was 100% from the day 7 until the day 56post-treatment in the dipping groups. The dipping groups morbility decrease to 0%from the day 7 and up to the end of this study. One of the relevant conclusion is that the evaluated dippings are 100% effective in M. ovinus elimination from the day 7 post-treatment.