FIG 2.
Dose-response assay of engineered insecticidal proteins in insect feeding assay using fall armyworms (FAW), Spodoptera frugiperda. Dose-response curves of Cry1Da_7 (A), Cry1B.868 (B), Cry1F.842 (C), Vip3A (D), Cry1A.105 (E), and Cry2Ab2 (F) show the mean insecticidal responses with standard errors as a function of the log10 value of the toxin dose. The insecticidal response was evaluated based on insect size with reference to the sizes of the positive control (100% response) and negative control (0% response), which were insects in the same assay treated with 2,760 ng/cm2 Cry1A.105 and buffer, respectively. See Materials and Methods for additional information.