Table 3. Imidacloprid concentrations, in ppb, in adult bees, honey, pollen and wax after exposure of bee colonies to imidacloprid in sugar syrup in Arkansas.
| Material | Treatment group | Aug. 31 | Sept. 29 |
|---|---|---|---|
| Adult bees | 100 ppb | 6.8±1.0 | 3.7±1.5 |
| 20 ppb | - | - | |
| 5 ppb | - | - | |
| Control | - | - | |
| Honey | 100 ppb | 23.8±10.3 | 28.6±3.5 |
| 20 ppb | 5.3±0.7 | 7.2±0.8 | |
| 5 ppb | 1.5±0.9 | 0.6±0.6 | |
| Control | - | - | |
| Pollen | 100 ppb | 1.9±0.6 | 0.5 ±0.5 |
| 20 ppb | 0.6±0.5 | - | |
| 5 ppb | 0.5±0.5 | - | |
| Control | - | - | |
| Wax | 100 ppb | 1.6±0.5 | - |
| 20 ppb | - | - | |
| 5 ppb | - | - | |
| Control | - | - | |
| Syrup | 100 ppb | 66.4 | |
| 20 ppb | 17.3 | ||
| 5 ppb | 8.1 | ||
| Control | 0 |
The limit of detection of imidacloprid was 1 ppb; dashes indicate none detected.