TABLE 2.
Toxicity of Cry1Ia7 against first-instar larvae of L. botrana, E. insulana, P. xylostella, and L. decemlineataa
| Treatment for indicated species | Regression line value
|
LC50 (μg/ml) | Distribution value
|
Relative potency | Confidence limit (95%)
|
|||
|---|---|---|---|---|---|---|---|---|
| Slope ± SE | a↓ ± SEb | χ2 | df | Lower | Upper | |||
| L. botrana | ||||||||
| Cry1Ab | 1.87 ± 0.20 | 4.71 ± 0.12 | 1.4 | 0.30 | 3 | 1 | ||
| Cry1Ia7 | 2.93 ± 0.19 | 2.65 ± 0.20 | 8.6 | 0.75 | 3 | 0.18 | 0.13 | 0.23 |
| E. insulana | ||||||||
| Cry1Ac | 1.87 ± 0.17 | 4.92 ± 0.06 | 1.1 | 0.09 | 3 | 1 | ||
| Cry1Ia7 | 3.25 ± 0.35 | 0.71 ± 0.47 | 21.1 | 1.27 | 3 | 0.05 | 0.04 | 0.06 |
| P. xylostella | ||||||||
| Cry1Abc | 1.90 ± 0.20 | ND | 0.08 | ND | ND | ND | ND | ND |
| Cry1Ia7 | 2.74 ± 0.25 | 2.01 ± 0.26 | 12.3 | 1.62 | 3 | ND | ND | ND |
| L. decemlineata | ||||||||
| Cry1Ba | 1.32 ± 0.09 | 3.35 ± 0.14 | 17.9 | 1.33 | 3 | 1 | ||
| Cry1Ia7 | 1.32 ± 0.09 | 3.68 ± 0.12 | 10.0 | 1.22 | 3 | 1.79 | 1.2 | 2.4 |
a
Relative potencies were calculated with respect to positive control Cry1 proteins that have been trypsin activated. ND, not determined.
b
a↓, intercept of the regression line.
c
Data are from reference 14.