Table 1 Time required for 50% of the population to be knocked down (LT 50 ) and resistance ratio relative to the susceptible strain (RR 50 ) of different age groups of wild An. gambiae mosquitoes from Tiassalé following exposure to five insecticides
Insecticide | Age (days) | LT50 | 95% confidence interval | RR50 |
|---|---|---|---|---|
Deltamethrin | *Kisumu (1–2) | 15.18 | (14.45-15-88) | 1 |
1 | 62.28 | (57.46-71.03) | 4.1 | |
2 | 80.93 | (69.37-102.37) | 5.33 | |
3 | 73.23 | (65.20-86.94) | 4.82 | |
5 | 72.7 | (65.42-85.32) | 4.79 | |
10 | 45.67 | (43.84-47-90) | 3.01 | |
Permethrin | Kisumu (1–2) | 14.59 | (13.96-15.20) | 1 |
1 | 164.04 | (105.91-497.81) | 11.24 | |
2 | 179.01 | (109.02-743.01) | 12.27 | |
3 | 193.31 | (112.62-951.82) | 13.25 | |
5 | 129.18 | (94.19-292.32) | 8.85 | |
10 | 69.64 | (63.50-79.50) | 4.77 | |
DDT | Kisumu (1–2) | 21.37 | (20.70-21.03) | 1 |
1 | +∞ | na | na | |
2 | +∞ | na | na | |
3 | +∞ | na | na | |
5 | 201.2 | (115.24-1129.87) | 9.42 | |
10 | +∞ | na | na | |
Malathion | Kisumu (1–2) | 24.93 | (24.11-25.73) | 1 |
1 | 61.79 | (56.86-69.04) | 2.48 | |
2 | 54.66 | (51.22-59.37) | 2.19 | |
3 | 63.76 | (58.59-71.63) | 2.56 | |
5 | 38.31 | (35.99-41.13) | 1.54 | |
10 | 48.77 | (46.08-52.24) | 1.96 | |
Propoxur | Kisumu (1–2) | 27.09 | (26.06-28.09) | 1 |
1 | +∞ | na | na | |
2 | +∞ | na | na | |
3 | +∞ | na | na | |
5 | 64.61 | (56.97-78.75) | 2.39 | |
10 | 74.61 | (67.48-89.31) | 2.75 |