TABLE 1.
Toxicity of B. thuringiensis subspp. kurstaki and aizawai and Cry toxins to the susceptible laboratory P. xylostella population ROTH
| Insecticide | LC50a (95% FL) | Avg slope (SE) | nb |
|---|---|---|---|
| Cry1Ac | 0.0019 (0.0015–0.0025) | 3.91 (0.48) | 156 |
| Cry1Ab | 0.0042 (0.003–0.0057) | 3.52 (0.57) | 234 |
| B. thuringiensis subsp. kurstaki | 0.054 (0.036–0.083) | 2.00 (0.28) | 237 |
| B. thuringiensis subsp. aizawai | 0.011 (0.008–0.017) | 1.85 (0.26) | 240 |
a
Cry1Ac and Cry1Ab values are in micrograms per milliliter; B. thuringiensis subsp. kurstaki and B. thuringiensis subsp. aizawai values are in international units per milligram.
b
Number of larvae used in bioassay, including control.