Table 3.
Insecticidal activity of Cry1Ab, Vip3Aa20 and Cry1F against FAW at 120 h after treatment
| Test protein | Protein concn. (ng/ml) | % Mortality (observed)a | % Mortality (expected) |
|---|---|---|---|
| Cry1Ab | 200 | 0.0 | N/A |
| 100 | 0.0 | ||
| 50 | 4.4 | ||
| 25 | 5.8 | ||
| 12.5 | 0.0 | ||
| Vip3Aa20 | 400 | 60.9 | N/A |
| 200 | 51.5 | ||
| 100 | 44.1 | ||
| 50 | 14.5 | ||
| 25 | 5.8 | ||
| Cry1F | 2,000 | 76.8 | N/A |
| 1,000 | 53.6 | ||
| 500 | 37.7 | ||
| 250 | 15.0 | ||
| 125 | 13.0 | ||
| Test mixtureb | B | 91.3 | 90.9 |
| B/2 | 85.5 | 77.5 | |
| B/4 | 71.0 | 66.7 | |
| B/8 | 47.1 | 31.5 | |
| B/16 | 20.3 | 18.0 |
a
All data were corrected for buffer control mortality using Abbott’s formula.
b
The test mixture B was composed of 200, 400, and 2,000 ng/ml diet of Cry1Ab, Vip3Aa20, and Cry1F, respectively, as described in the Methods section.