Table 3.
Susceptibility to Cry2Ad toxin in a susceptible strain (Fuzhou-S), resistant strain (Fuzhou-R2Ad), and different reciprocal crosses of the P. xylostella strains.
| Strain or cross | Number of insects tested | Slope ± SE | LC50 (95% fiducial limits) (ng/mL) | RR* | P (df = 3) |
|---|---|---|---|---|---|
| Fuzhou-S | 216 | 1.44 ± 0.25 | 9.84 (6.98–13.61) | 1.00 | 0.8874 |
| Fuzhou-R2Ad | 216 | 1.26 ± 0.31 | 800.73 (372.94–6142.62) | 81.37 | 0.9633 |
| F1 (Fuzhou-R2Ad♀ × Fuzhou-S♂) | 216 | 1.39 ± 0.22 | 230.27 (155.81–457.35) | 23.40 | 0.9737 |
| F1’ (Fuzhou-R2Ad♂ × Fuzhou-S♀) | 216 | 1.15 ± 0.25 | 116.91 (77.44–187.60) | 11.88 | 0.8206 |
| R × S (pooled) | 432 | 1.27 ± 0.23 | 173.59 (116.62–322.47) | 17.64 | — |
| S × F1 (F1♀ × S♂) | 216 | 0.83 ± 0.24 | 297.84 (160.45–1591.57) | 30.27 | 0.9696 |
| F2 (F1 × F1) | 216 | 1.14 ± 0.25 | 77.71 (53.83–107.38) | 7.90 | 0.8943 |
Resistance ratio is presented by LC50 of a given strain or cross divided by LC50 of the susceptible Fuzhou-S strain.