Table 4.
Toxicity of Bacillus thuringiensis israelensis (IPS82) to 3rd instar Aedes aegypti larvae from sampled populations
| |
|
|
|
LC50a |
LC90a |
||
|---|---|---|---|---|---|---|---|
| Samples | Origin | Temephos statusb | No. larvae | Mean (95% fiducial limits) | RRc | Mean (95% fiducial limits) | RRc |
| Rockefeller |
Laboratory |
S |
1620 |
0.008 (0.007-0.009) |
1.0 |
0.026 (0.021-0.036) |
1.0 |
| F. de Noronha |
Field |
S |
1140 |
0.013 (0.011-0.015) |
1.6 |
0.030 (0.024-0.042) |
1.2 |
| Bacabal |
Field |
MR |
1140 |
0.014 (0.012-0.016) |
1.8 |
0.043 (0.035-0.058) |
1.7 |
| Recife |
Field |
MR |
1440 |
0.015 (0.014-0.018) |
1.9 |
0.027 (0.024-0.031) |
1.0 |
| Macapá |
Field |
HR |
1380 |
0.012 (0.011-0.014) |
1.5 |
0.031 (0.027-0.038) |
1.2 |
| João Pessoa |
Field |
HR |
1380 |
0.011 (0.009-0.012) |
1.4 |
0.035 (0.027-0.049) |
1.3 |
| Salgueiro |
Field |
HR |
1080 |
0.015 (0.012-0.018) |
1.9 |
0.025 (0.021-0.031) |
1.0 |
| G. do Goitá |
Field |
HR |
1080 |
0.015 (0.013-0.018) |
1.9 |
0.025 (0.022-0.033) |
1.0 |
| Oiapoque |
Field |
HR |
1440 |
0.011 (0.004-0.012) |
1.4 |
0.026 (0.021-0.030) |
1.0 |
| Cedro |
Field |
HR |
1200 |
0.012 (0.010-0.015) |
1.5 |
0.031 (0.024-0.068) |
1.2 |
| A. da Ingazeira |
Field |
HR |
1260 |
0.017 (0.016-0.020) |
2.1 |
0.030 (0.026-0.035) |
1.2 |
| S. J. do Egito |
Field |
HR |
1200 |
0.011 (0.010-0.013) |
1.4 |
0.030 (0.024-0.038 |
1.2 |
| S. C. do Capibaribe |
Field |
HR |
1260 |
0.009 (0.008-0.010) |
1.1 |
0.025 (0.018-0.051) |
1.0 |
| Agrestina |
Field |
HR |
1320 |
0.017 (0.016-0.019) |
2.1 |
0.028 (0.026-0.032) |
1.1 |
| Araripina | Field | HR | 1440 | 0.013 (0.012-0.015) | 1.6 | 0.035 (0.029-0.045) | 1.3 |
aLethal Concentrations (mg/L) for 50% (LC50) or 90% (LC90) of larvae after 24 h. bClassification adapted from Mazzari and Georghiou (1995): S-Susceptible (RR < 3), LR-Low Resistance (3 < RR < 5), MR-Moderate Resistance (5 < RR < 10), HR-High Resistance (>10).
cResistance Ratio: LC for sample tested/LC for the Rockefeller reference colony.