Table 1.
Mean percentage of mortality in honey bees after a 7-day period of chronic exposure to conventional pollen, CCRI41 (Cry1Ac + CpTI) pollen, and conventional pollen containing imidacloprid at 48 ppb (part per billion) (n = 40 bees per cage)
| Treatment | Percentage of mortality |
|---|---|
| Control | 13.8 ± 2.4 |
| CCRI41 (Cry1Ac + CpTI) | 21.3 ± 1.6 |
| Imidacloprid | 20.0 ± 1.0 |
| Source of variation | Degrees of freedom | χ2 | P-value |
|---|---|---|---|
| Food type | 2 | 5.52 | 0.0632 |
| Replicate | 3 | 0.20 | 0.9782 |
| Food type × replicate | 6 | 4.80 | 0.5692 |
Statistics from the log linear model used to analyze the proportion of dead honey bees at the end of the oral chronic exposure period among treatments (food type factor) and as function of replicate factor (four replicates (cages) per food type with 40 individual bees per replicate)