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The Rhipicephalus (Boophilus) microplus is the main cattle tick, responsible for large losses in Brazilian cattle. Control of R. (B.) microplus relies almost exclusively on the use of chemicals. But increasingly this species of tick has shown resistance to products used mainly by the poor use of acaricides. The goal of this work is to evaluate the situation of the resistance of the cattle tick Rhipicephalus (B.) microplus to acaricides used in the Western Goiano, as well as analyze the factors involved in this resistance. Tests will be performed immersion Riphicephalus ticks (Boophilus) microplus using ten commercial products with different active ingredients, in order to verify the effectiveness rate of products available acaricides. After the test results, it was found that the product was more effective Cypermethrin 6.0 g + 50 g Chlorpyrifos 98.20% and was less effective Deltrametrina 25 g with 19.87%, since the majority of active ingredients did not show good efficacy on the tick population in the region Goiano West.

Susceptibility of Rhipicephalus (Boophilus) microplus to acaricides in dairy cattle in the region of Goiano West, Brazil