Interactions between plants, herbivores and herbivore natural enemies, so-called tritrophic interactions, are important determinants of ecological processes in nature and crop yield in agriculture. Interactions between primary producers and consumers at different trophic levels have fueled the evolution of complex life on this planet and determine the composition and basic properties of agroecosystems. By combining multidisciplinary approaches, ranging from molecular biology, analytical chemistry to behavioral ecology, we aim at discovering new info-chemical pathways and mechanisms shaping these interactions and their ecological relevance.