Mortality (%) of <i>Chlosyne lacinia</i> (Lepidoptera: Nymphalidae) larvae exposed to Cry1Ac on wild sunflower leaves after immersion for 30 s in a solution containing the indicated concentration of Cry1Ac and 0.02% Tween (<i>N</i> = 10 larvae per instar for each toxin concentration, and were repli

*Values followed by the same letter are not significantly different. The first letter indicates the difference in the same column (related to the mortality in each Cry1Ac concentration in one instar) and the second letter indicates the difference in the same line (related to the mortality in one concentration of Cry1Ac among the instars). The comparison was made by GLM (P<0.01).