Table 1.
Mortality rate, LT50, knockdown rate and KT50 of field and insectary strains of Culex pipiens to different insecticides
| Field strain | Insectary strain | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Insecticides | DD (%) | MR (%) | LT50 (min) | KR (%) | KT50 (min) | DD (%) | MR (%) | LT50 (min) | KR (%) | KT50 (min) |
| Cyfluthrin | 0.15 | 44.0 | 66.0 | 12.8 | 430 | 0.15 | 56.0 | 50.4 | 51.5 | 71.9 |
| Etofenprox | 0.5 | 17.0 | 136 | 2.4 | 990 | 0.5 | 28.0 | 83.9 | 54.3 | 87.7 |
| bendiocarb | 0.1 | 58.0 | 73 | 39.4 | 139 | 0.1 | 63.0 | 50.0 | 31.7 | 140.0 |
| Malathion | 5.0 | 82 | 29.7 | 35 | 74.5 | 5.0 | 73.0 | 40.8 | 35.3 | 94.7 |
| Propoxur | 0.1 | 18 | 60.3 | 26.8 | 140.1 | 0.1 | 64.0 | 34.1 | 30.0 | 164.9 |
| Fenitrothion | 1.0 | 54.0 | 57.0 | 15.7 | 339.2 | 1.0 | 63.0 | 56.2 | 20.7 | 223.7 |
| DDT | 4.0 | 12.0 | 240.0 | 2.1 | 1567 | 4.0 | 15.0 | 163.5 | 4.0 | 1185 |
| Lambdacyhalothrin | 0.05 | 40.0 | 59.0 | 13.6 | 300.5 | 0.05 | 69.0 | 43.1 | 67.3 | 41.1 |
| Deltamethrin | 0.05 | 49.0 | 38.3 | 41.2 | 66.7 | 0.05 | 69.0 | 34.8 | 23.3 | 143.2 |
| Permethrin | 0.75 | 34.0 | 66.7 | 7.6 | 223.4 | 0.75 | 66.0 | 47.9 | 26.2 | 198 |