S. exigua larvae perform better on jai1 mutants than on wild type. The experiment involved 300 and 150 four-day-old larvae on wild-type and jai1 plants, respectively. (A) Percent survival of S. exigua larvae on wild type (WT2, Castlemart, blue) and the jai1 mutant (yellow). (B) Larval development on wild-type (blue) and jai1 (yellow) host plants. Larval mass is given in mg as the mean +/- SD. Asterisks indicate significant differences (Wilcoxon signed rank test: *** P < 0.001). (C) S. exigua larvae at the end of the experiment, prior to pupation (scale bar = 1 cm).