Phytochemical and Biological Study of Trophic Interaction between L. Larvae and L.

In this article, we propose to explore the chemical interaction between L. and L. using different analytical methods, including an innovative electrochemical approach (called electrochemical ecology) and multivariate analysis, and we investigate the potential antimicrobial effects (antibacterial and antifungal activities) of this interaction in order to gain a better understanding of their specific interaction. The analytical study presents a similar chemical profile between the leaves of healthy and herbivorous and the excretions of the caterpillars. The similar analytical profile of the leaves of and the excretions of , and the difference with the caterpillar bodies, suggests a selective excretion of compounds by the caterpillar. The measured antimicrobial activities support the physicochemical tests. The natural products found selectively in the excretions (rather than in the body) could explain the ability of to feed on this toxic Apocynaceae species.