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Pathogenicity of vegetative cells from B. thuringiensis wild-type and mutant strains injected into the hemocoel of B. mori larvae
| Strain | LD50 (95% CL)a
|
|
|---|---|---|
| At 24 h (CFU/injected larva) | At 48 h (CFU/injected larva) | |
| 407 Cry− | 12.55 (4.82-22.51) | Unchanged |
| 407 Cry− ΔyqgB | 19 (8.58-30.82) | Unchanged |
| 407 Cry− ΔyqfZ | 14 (4.97-28.44) | Unchanged |
| 407 Cry− ΔyqgB ΔyqfZ | 178 (70.4-407.33) | 12.71 (0.24-33.55) |
LD50 was calculated by log-probit analysis. CL, confidence limit (8).
