A veterinarian recommends dipping cattle in an acaricide solution to control a particular pest. The pest being targeted is most likely a

Acaricides are chemicals specifically formulated to kill arachnids, particularly ticks and mites, which are ectoparasites. Cattle dipping or spraying with acaricide is a standard method of tick control. Roundworms, tapeworms, and liver flukes are endoparasites controlled with anthelmintics, not acaricides.