Table 1.
Deltamethrin resistance characteristics of Tunisian Culex pipiens pipiens
| Population | Deltamethrin | Deltamethrin +DEF | Deltamethrin +Pb | ||||||||||
| LC50 in µg/l (a) |
Slope± SE | RR50 (a) |
LC50 in µg/l (a) |
Slope± SE | RR50 (a) |
SR50 (a) |
RSR | LC50 in µg/l (a) |
Slope± SE | RR50 (a) |
SR50 (a) |
RSR | |
| Slab | 0.18 (0.17–0.20) |
3.53 ± 0.24 | − | 0.18 (0.07–0.47) |
2.59 ± 1.07 | − | 1.02 (0.41–2.56) |
− | 0.02 (0.01–0.06) |
1.20± 0.33 | − | 10.0 (6.27–16.1) |
− |
| 1- Sidi Hcine | 5.7 (2.8–11) |
1.36 ± 0.25 | 31.4 (21.1–46.6) |
4.5 (3.1–6.5) |
1.34 ± 0.12** | 25.5 (10.4–62.1) |
1.26 (0.84–1.89) |
1.23 | 0.03 (0.02–0.05) |
1.45 ± 0.21 | 1.74 (1.04–2.92) |
181 (116–282) |
18.0 |
| 2- El Fahs | 0.12 (0.07–0.23) |
2.01 ± 0.42 | 0.67 (0.41–1.08) |
− | − | − | − | − | − | − | − | − | − |
| 3- Jebeniana | 0.15 (0.06–0.40) |
1.23 ± 0.31 | 0.81 (0.53–1.24) |
− | − | − | − | − | − | − | − | − | − |
(a). 95% CI;
**
Parallelism test positif but without probability.
RR50. resistance ratio at LC50 (RR50=LC50 of the population considered/LC50 of Slab); SR50. synergism ratio (LC50 observed in absence of synergist/LC50 observed in presence of synergist). RR and SR considered significant (P<0.05) if their 95%CI did not include the value 1.
RSR. relative synergism ratio (RR for insecticide alone / RR for insecticide plus synergist).
Note: the empty cells was due to the loss of some populations.