Potency of modified Bt toxins relative to native Bt toxins against resistant and susceptible strains of pink bollworm.

aLC50 of a native toxin divided by the LC50 of a modified toxin (based on data from Table 1). Potency ratios > 1 indicate the modified toxin was more potent than the native toxin; potency ratios <1 indicate the modified toxin was less potent than the native toxin.