Table 2 Permethrin residues on insecticidal fabric after repeated washings and bioefficacy against Aedes aegypti mosquitoes in continuous exposure bioassay (improved test method)
Wash no. (Sample C) | Permethrin residue (mg/m2) | Retention of permethrin (%) | Continuous exposure mean CKDT in min (95% CI) |
|---|---|---|---|
0 | 1590 | 100 | 10.5a (10.0–11.0) |
1 | 1353 | 85.1 | 16ab (14.4–17.6) |
2 | 1051 | 66.1 | 17.3abc (14.9–19.7) |
3 | 921 | 57.9 | 18.8abc (17.2–20.4) |
4 | 911 | 57.3 | 22.3bc (20.7–23.9) |
5 | 891 | 56.0 | 25.3c (23.8–26.8) |
6 | 770 | 48.4 | 36d (32.4–39.6) |
7 | 710 | 44.7 | 39.5de (35.6–43.4) |
8 | 689 | 43.3 | 42.4de (38.3–46.5) |
9 | 644 | 40.5 | 44.8de (37.5–52.1) |
10 | 576 | 36.2 | 48.3e (41.2–55.4) |