(A) BX concentration in larvae of the specialist D. virgifera, and the generalists D. undecimpunctata (D.undecim.) and D. balteata. Numbers denote the six most abundant BXs. Stars indicate significant differences between species (one-way ANOVA on transformed data (rank and square root transformations), *p<0.05). (B) BX concentrations in the haemolymph, gut, muscles, exudates (surface), and frass of D. virgifera larvae fed on wild-type B73 plants. (C) Correlation between BX concentrations in maize B73 plants and in third instar D. virgifera larvae that fed on those plants since hatching. Unlabeled blue dots correspond to other types of BXs. A linear regression between plant and larval concentrations is shown (R2 = 0.8141, p=0.004, excl. MBOA-Glc and HDMBOA-Glc). Means ± SE are shown. Raw data are available in Figure 1—source data 1.