Table 2.
Mortality slope, LC50 and LC95 confidence limit, resistance factor, and resistance level against deltamethrin, flumethrin, and fipronil as determined by AIT and LPT of ticks collected from North Gujarat, India.
| Variable | Slope ± SE (95% CL) | R 2 (%) | LC50 (95% CL) | LC95 (95% CL) | RFa | RLb |
|---|---|---|---|---|---|---|
| Adult Immersion Test | ||||||
| Deltamethrin | 3.51 ± 0.86 (0.78–6.23) | 84.00 | 50.35 (46.29–59.34) | 147.11 (120.94–230.89) | 3.76 | I |
| Flumethrin∗ | 2.17 ± 0.60 (0.25–4.10) | 81.00 | 41.81 (36.40–54.54) | 239.20 (173.85–498.26) | ||
| Fipronil | 5.43 ± 1.15 (2.24–8.61) | 85.00 | 6.36 (6.02–7.07) | 12.76 (11.23–17.10) | 3.78 | I |
|
| ||||||
| Larval Packet Test | ||||||
| Deltamethrin | 2.38 ± 0.10 (2.06–2.70) | 99.50 | 75.24 (66.35–95.83) | 367.74 (275.10–716.91) | 6.38 | II |
| Flumethrin∗ | 3.01 ± 0.40 (1.74–4.29) | 94.90 | 51.83 (46.93–62.74) | 181.5 (144.31–307.53) | ||
| Fipronil | 5.94 ± 1.94 (0.55–11.33) | 69.99 | 5.66 (5.38–6.23) | 10.65 (9.49–13.91) | 2.36 | I |
∗Resistance factors and levels could not be detected as baseline data is yet to be developed.
aRF: LC50 of field populations/LC50 of susceptible population.
bSusceptible = RF < 1.4; level I = 1.5 < RF < 5; level II = 5.1 < RF < 25; level III = 26 < RF < 40; level IV = RF > 41; S = susceptible.