Table 3.
Knockdown effect, mortality rate, and susceptibility status of Aedes aegypti populations from Pernambuco-Brazil to the pyrethroid cypermethrin (8 µg/bottle)
| Knockdown effect (%) | Mortality rate (%) after cypermethrin exposure | |||||||
|---|---|---|---|---|---|---|---|---|
| Exposure time | Recovery time | |||||||
| Meso-Region | Population | Generation | Number of females | 15 min | 30 min | 120 min | 24 h | Susceptibility status |
| Rockefellera | 149 | 94.6 | 100 | 100 | 100 | Susceptible | ||
| Arquipélago | F. de Noronha | F2 | 148 | 83.1 | 97.9 | 100 | 70.2 | Resistant |
| Metropolitana | Recife | F1 | 160 | 14.0 | 52.5 | 93.7 | 32.5 | Resistant |
| Ipojuca | F1 | 134 | 5.20 | 35.8 | 91.0 | 58.2 | Resistant | |
| Olinda | F1 | 145 | 6.90 | 32.4 | 93.8 | 35.2 | Resistant | |
| Mata | G. de Goitá | F1 | 153 | 51.6 | 84.3 | 100 | 66.0 | Resistant |
| Agreste | Santa Cruz | F1 | 139 | 64.7 | 88.5 | 100 | 58.9 | Resistant |
| Agrestina | F2 | 163 | 13.5 | 73.6 | 98.1 | 43.5 | Resistant | |
| Itaíba | F1 | 153 | 1.96 | 18.9 | 85.6 | 27.4 | Resistant | |
| Caruaru | F2 | 167 | 4.80 | 34.7 | 82.6 | 31.7 | Resistant | |
| Sertão | Cedro | F1 | 158 | 72.1 | 90.5 | 100 | 70.8 | Resistant |
| Salgueiro | F1 | 150 | 82.0 | 95.3 | 100 | 68.6 | Resistant | |
| A. da Ingazeira | F1 | 152 | 54.6 | 83.5 | 96.7 | 36.8 | Resistant | |
| S. J. do Egito | F1 | 170 | 42.9 | 86.5 | 99.4 | 64.1 | Resistant | |
| S. Talhada | F2 | 165 | 0.0 | 4.84 | 67.3 | 18.8 | Resistant | |
| Arcoverde | F2 | 148 | 0.0 | 8.80 | 66.9 | 10.8 | Resistant | |
| Sertão do São Francisco | Petrolina | F1 | 158 | 1.9 | 29.1 | 84.8 | 22.1 | Resistant |
aControl strain.