Table 3. Knockdown time (min) KT50 and KT99 against 0.75% permethrin and 31.25mg/l temephos of Ae. aegypti female adults and larval from field and laboratory strains.
| Strain | Insecticide | KT50(mins)/LC50(mg/l) [95% CI] |
KT99/LC99 [95% CI] |
Discriminating Concentration | RR | Regression ± SD |
|---|---|---|---|---|---|---|
| Field hotspot | Permethrin | 29.042 [2.2,3.1] |
151.225mins [4.40,7.70] |
- | 4.00 | 4.479±0.431 |
| Temephos | 0.153 [0.00,0.21] |
0.543mg/l [0.30,0.63] |
1.086mg/l | 38.25 | 3.451±0.262 | |
| Field non-hotspot | Permethrin | 54.567 [1.6,1.8] |
503.375mins [3.10,3.90] |
- | 7.00 | 4.195±0.383 |
| Temephos | 0.148 [0.15,0.16] |
0.405mg/l [0.28,0.31] |
0.810mg/l | 37.00 | 4.408±0.293 | |
| Laboratory | Permethrin | 7.909 [0.82,0.89] |
17.138mins [1.23,1.36] |
- | 1.00 | 1.994±0.8755 |
| Temephos | 0.004 [0.00,0.006] |
0.009mg/l [0.07,0.01] |
0.018mg/l | 1.00 | 16.583±1.237 |
KT50: Time duration required to knockdown 50% of the population after exposure to insecticide. KT99: Time duration required to knockdown 99% of the population after exposure to insecticide.