Use of anti-tick drugs in dairy farms in the microregion of Alfenas, Minas Gerais, Brazil

Abstract Ectoparasitic infestation in dairy cattle, the most common being Rhipicephalus (Boophilus) microplus, causes significant loss production. The control of ectoparasites often occurs incorrectly, resulting resistance to active ingredients and residues milk. To understand acaricide use microregion Alfenas, Minas Gerais (Brazil), questionnaires were applied owners 100 farms region selected randomly. Dairy allocated according production scale: up 150 liters/day, 151-400 liters/day more than 400 liters/day. interviewees asked about characteristics, management ingredients. interview answers subjected descriptive analysis. Results showed that all properties, independent production-scale, used acaricides. cited was: Cypermethrin Chlorpyrifos Citronellal (31%), Fluazuron (18.6%) Fipronil (17%). Among interviewed, 41,1% drugs have restrictions are not allowed legislation for lactating cows (fluazuron, fipronil, ivermectin). 15% affirmed they weren’t aware “withdrawal period” medication 73% change ingredient used. In order revert this antiparasitic drug’s situation contamination milk with drug residues, it is necessary focus on awareness producers training labor.