The 2013 meeting will be the 12th Gordon Research Conference on Plant-Herbivore Interactions. For over 30 years, the GRC series on Plant-Herbivore Interactions has served as a premier forum for scientists investigating the ecology and evolution of plant-herbivore interactions. In addition to being an important venue for sharing late breaking results, its broad influence makes the conference series an influential determinant of research directions in the field. The 12th GRC on Plant-Herbivore Interactions will bring together an outstanding group of junior and senior scientists. Sessions will include evolution of plant defenses, microbial contributions to extended phenotypes, and the consequences of induction to individuals, populations and communities. The conference will embrace mechanism and theory, and link ecology and evolution. To complement the diverse themes of the session presentations, four poster sessions are scheduled for the evenings and all attendees are encouraged to contribute a poster. The collegial atmosphere of this Conference and breadth of research areas represented, with programmed morning and evening discussion sessions and opportunities for informal gatherings in the afternoons and evenings, provides an exciting venue for scientists from different disciplines to brainstorm and debate across disciplinary boundaries. Application to Attend the Conference: Individuals interested in attending the conference should apply online. It is expected that the majority of the applications will be accompanied by an abstract that will be presented as a poster. Logistics for poster presentations will be provided several months before the conference.