We study the role of chemicals in the interactions among organisms, with an emphasis on plant-insect interactions. We are interested in the mechanisms, as well as the ecological and evolutionary implications of these interactions. Our research has lead to several key discoveries of how plant-produced chemical mediate the interactions among plants, herbivores that feed on the plants, and the natural enemies of these herbivores. In addition to trying to complete our fundamental understanding of these interactions, we currently explore ways to use this knowledge for the development of novel crop protection strategies.