Evaluation of the Efficacy of Acaricides Used to Control the Cattle Tick, Rhipicephalus microplus, in Dairy Herds Raised in the Brazilian Southwestern Amazon

Table 1

Efficacy of different acaricide bases on populations of Rhipicephalus microplus collected from dairy herds in the state of Rondônia, Brazil.

Chemical group; of function	Min. efficacy (%)	Max. efficacy (%)	Mean efficacy (%  ±SD)
Amidin	51.35	100	77.20 ± 15.53
Cypermethrin	48.35	70.5	61.23 ± 6.83
Deltamethrin	61.22	76.84	67.10 ± 4.70
Cypermethrin + dichlorvos	68.91	81.47	74.08 ± 4.10
Cypermethrin + chlorpyrifos + citronellal	72.41	86.37	78.08 ± 4.10
Doramectin	86.21	100	99.74 ± 1.43
Ivermectin	86.84	100	97.61 ± 4.29
Abamectin	81.34	100	99.65 ± 2.22
Milbemycin	94.84	100	99.94 ± 0.51
Spinosin	93.21	100	99.96 ± 0.23
Phenylpyrazole	92.78	100	99.90 ± 0.74