Fig. 1

Fold change values discriminating leaf and frass common components in the interaction betweem Mentha aquatica and Chrysolina herbacea. Orange bars and boldfaced compounds refer to frass extracts. Fold changes are expressed as Leaf value /Frass value. In order to express negative values, data are expressed as −1/(A/B) when the A/B value is <1, where A and B indicate, respectively, Leaf value and Frass value. Error bars represent standard deviations