Table 6.
Results of the rapid bioassays of 10 commonly used insecticides against Aedes aegypti
| Insecticides | Mortality rates* | |||||
|---|---|---|---|---|---|---|
| Susceptible | Daliao (East) | Gushan (West) | Qianzhen (South) | Nanzi (North) | Sanmin (Central) | |
| Cypermethrin | 100% (–) | 0% (+) | 76% (+) | 0% (+) | 81% (+) | 0% (+) |
| Tetramethrin | 100% (–) | 88% (+) | 95% (±) | 78% (+) | 98% (–) | 85% (+) |
| Permethrin | 100% (–) | 71% (+) | 88% (+) | 33% (+) | 91% (±) | 76% (+) |
| Deltamethrin | 100% (–) | 78% (+) | 21% (+) | 45% (+) | 83% (+) | 8% (+) |
| Chlorpyrifos | 100% (–) | 31% (+) | 70% (+) | 0% (+) | 75% (+) | 18% (+) |
| Fenitrothion | 100% (–) | 73% (+) | 100% (–) | 0% (+) | 100% (–) | 0% (+) |
| Pirimiphos-methyl | 100% (–) | 76% (+) | 16% (+) | 13% (+) | 91% (±) | 58% (+) |
| Propoxur | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Fipronil | 100% (–) | 88% (+) | 91% (±) | 76% (+) | 100% (–) | 91% (±) |
| Imidacloprid | 100% (–) | 90% (±) | 100% (–) | 0% (+) | 100% (–) | 18% (+) |
*Mortality rates of 98–100%, 90–97%, and < 90% within 30 min indicate no resistance (–), possible resistance (±), and resistance (+), respectively