Table 2. Variation in neonicotinoid sensitivity by feeding bioassays among three stocks of commonly used honey bees.
Different letters for LC50 values in the same row indicate significant differences. Different symbols for slope values in the same row indicate significant differences. The LC50 values for imidacloprid and thiamethoxam are expressed in ng/ml/mg bee.
| Carniolan | Italian | Russian | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Compound | n | LC50 (95% CI) | Slope (SE) | n | LC50 (95% CI) | Slope (SE) | n | LC50 (95% CI) | Slope (SE) |
| Imidacloprid | 302 | 83.3 (59.1–148.2)c | 1.1 (0.2)‡ | 590 | 2.5 (0.6–5.0)a | 0.9 (0.2)‡ | 720 | 39.3 (32.6–47.5)b | 1.3 (0.1)‡ |
| Thiamethoxam | 778 | 2.70 (2.50–2.90)b | 4.2 (0.3)‡ | 257 | 1.86 (1.46–2.32)a | 2.0 (0.2)* | 169 | 6.34 (4.08–8.64)c | 1.8 (0.3)* |