Evaluation of the effectiveness of ixodicides on Rhipicephalus (Boophilus) microplus in bovinos in a population of the state of Nuevo León, Mexico / Avaliação da eficácia de ixodicides em Rhipicephalus (Boophilus) microplus em bovinos em uma população do estado de Nuevo León, México

Abstract

The Rhipicephalus (Boophilus) microplus tick is of great importance in livestock due to its direct and indirect effects, it has a distribution of 69.4% of the national territory, with approximate losses of up to 573.61 million dollars per year in Mexico. Chemical control is the most widely used method, however, continuous, and indiscriminate use has led to the emergence of populations of resistant ticks. In this study, the efficacy of three synthetic ixodicides, a pyrethroid, an organophosporade, and a pyrethroid- organophosporade mixture were evaluated. in a field population through the adult immersion test, obtaining efficacy rates of 28.66%, 100%, and 96%, respectively. It was obtained that the organophosphate is the only ixodicide that can be used in this population.