TABLE 3.
Response of the resistant GYBT, susceptible GY, and F1 progeny of H. armigera to activated Cry1Ac toxin
| Strain or progeny | LC50 (μg/cm2) | 95% FLa | Slope ± SE | RRb | Dc | No. of larvae tested |
|---|---|---|---|---|---|---|
| GY | 0.10 | 0.08-0.12 | 1.60 ± 0.17 | 1 | 437 | |
| GYBT | 56.4 | 31.4-217 | 1.00 ± 0.23 | 564 | 233 | |
| F1 progeny | ||||||
| GYBT females × GY males | 0.51 | 0.30-0.83 | 2.03 ± 0.24 | 5.1 | −0.49 | 235 |
| GY females × GYBT males | 0.41 | 0.32-0.52 | 1.78 ± 0.25 | 4.1 | −0.55 | 204 |
a
FL, fiducial limit.
b
RR, the resistance ratio determined by dividing the LC50 of the resistant strain by the LC50 of the reference GY strain.
c
D was calculated using the method of Stone (21).