Table 3.
Results of the rapid bioassays of 10 commonly used insecticides against Blattella germanica
| Insecticides | Mortality rates* | |||||
|---|---|---|---|---|---|---|
| Susceptible | Daliao (East) | Gushan (West) | Qianzhen (South) | Nanzi (North) | Sanmin (Central) | |
| Cypermethrin | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Tetramethrin | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Permethrin | 100% (–) | 98% (–) | 100% (–) | 83% (+) | 100% (–) | 100% (–) |
| Deltamethrin | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Chlorpyrifos | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Fenitrothion | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Pirimiphos-methyl | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Propoxur | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
| Fipronil | 100% (–) | 100% (–) | 100% (–) | 98% (–) | 100% (–) | 100% (–) |
| Imidacloprid | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) | 100% (–) |
*Mortality rates of 98–100%, 90–97%, and < 90% within 24 h indicate no resistance (–), possible resistance (±), and resistance (+), respectively