Figure 1. Pectinophora gossypiella dose-mortality response curves to Cry1Ac-incorporated artificial diet. Mean corrected % mortality plotted from 10–18 replications of five larvae per replicate. Insert shows mortality curve for Bt4R obtained from single larva bioassays with Cry1Ac concentrations of 1–1000 μg ml⁻¹ and from which LC₅₀ was estimated. Error bars are standard errors.