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Acaricidal efficacy of four chemicals i.e. Coumaphos, Diazinon, Permethrin and Ivermectin was evaluated on the basis of reduction in number of ticks, in treated animals compared with untreated. Ivermectin proved to be the best (82.9 to 85.7 %) followed by Diazinon (66.7 to 69.7 %), Permethrin (55.9 to 61.7 %) and Coumaphos (53.1 to 54.0 %) in order of their effectiveness to control ticks in sheep and goats.