Table II.
Bioassays using S. littoralis larvae fed on transgenic tobacco plants
| Line | Mortality at 10 d | Larvae
Instar at 10 d
|
Mean Wt at 10 d | Leaf Surface Eaten | ||
|---|---|---|---|---|---|---|
| L2 | L3 | L4 | ||||
| % of initial | % of surviving larvae | mg | cm2 per larvae | |||
| Control | 7 | 4 | 85 | 11 | 40.6 | 4.18 |
| 2T | 27 | 9 | 91 | 0 | 24.5 | 2.92 |
| 4T | 0 | 0 | 80 | 20 | 54.0 | 5.26 |
Assays were performed on groups of 30 pre-L2 instar larvae fed for 10 d on transgenic tobacco leaves. Mortality at the end of the assay is reported as the percentage of initial larvae number. Larval instar at the end of the assay is given as a percentage of surviving larvae. L2, L3, and L4 refer to instar 2, 3, and 4, respectively. Leaf-surface damage was measured after the last 2 d of the assay (d 9 and 10).