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. 2021 Jul 14;53(3):402. doi: 10.1007/s11250-021-02849-2

Table 1.

Lethal concentrations (g/l) of Amblyomma variegatum and Rhipicephalus microplus and their resistance to deltamethrin and cypermethrin regarding to strain Rhipicephalus geigyi as reference strain

Tick species LC50 (95% CI) LC90 (95% CI) RR50 (95% CI) RR90 (95% CI) Slopes
Deltamethrin
R. geigyi 0.0031 (0.0030–0.00323) 0.0066 (0.0064–0.0068) –- –-  − 2.934 ± 0.125
A. variegatum 0.0016 (0.0015–0.0016) 0.0031 (0.0001–0.0032) 0.50 (0.48–0.53) 0.48 (0.43–0.53)  − 3.161 ± 0.146
R. microplus 0.0879 (0.0776–0.0963) 0.2142 (0.1899–0.2385) 28.18 (24.93–32.41) 32.41 (25.24–45.25)  − 2.437 ± 0.243
Cypermethrin
R. geigyi 0.0062 (0.0059–0.0065) 0.009567 (0.0091–0.010 –- –-  − 5.020 ± 0.430
A. variegatum 0.0042 (0.0040–0.0044) 0.0076 (0.0073–0.0079) 0.68 (0.64–0.72) 0.79 (0.69–0.90)  − 3.706 ± 0.255
R. microplus 0.0547 (0.0484– 0.0610) 0.2258 (0.2012–0.2504) 8.79 (7.83–10.02) 23.15 (18.43–31.10)  − 1.550 ± 0.003

Legend: R, Rhipicephalus; A, Amblyomma; LC, lethal concentration; CI, confidence interval; RR, resistance ratio.