TABLE II. Mean lethal concentrations for 50% individuals (LC50) calculated for all the populations of each species and tolerance ratios obtained for each species with individual Cry toxins and commercial Bacillus thuringiensis subsp. israelensis ( Bti ).
| LC50 | |||||
|---|---|---|---|---|---|
| Species | Size (mm) | Cry4Aa (ng/mL) | Cry4Ba (ng/mL) | Cry11Aa (ng/mL) | Bti a (µg/mL) |
| Aedes rusticus | 10.6 ± 0.8 | 262.7 ± 88.3 | 60.9 ± 15.2 | 106.9 ± 22.2 | 2.03 ± 1.05 |
| Aedes sticticus | 6.3 ± 0.9 | 14.8 ± 6.8 | 8.9 ± 0.0 | 15.7 ± 11.0 | 0.11 ± 0.028 |
| Aedes vexans | 6.2 ± 0.6 | 67.6 ± 6.4 | 13.5 ± 0.4 | 27.1 ± 11.7 | 0.11 ± 0.009 |
| Tolerance ratios | |||||
| Ratio sp1/sp2 | Size | Cry4Aa | Cry4Ba | Cry11Aa | Bti a |
| Ae. rusticus/Ae. sticticus | 1.7x | 17.8x | 6.8x | 6.8x | 18.5x |
| Ae. rusticus/Ae.vexans | 1.7x | 3.9x | 4.5x | 3.9x | 18.5x |
| Ae. vexans/Ae. sticticus | 1.0x | 4.6x | 1.5x | 1.7x | 1.0x |