Based on the testimonies and career paths of Moroccan workers hired on seasonal contracts through the International Organization for Migration (IOM), this article shows how the governance of chemical risk in agriculture has authorized the circulation of toxic substances in the workplace. By setting up a regulatory framework for exposure, the "controlled use" of pesticides produces "clandestine" contamination and makes it possible to sidestep responsibility for its health effects. This paper explores the question of how the IOM's seasonal immigration process helps organize both the invisibilization of occupational exposure to pesticides and the outsourcing of the pathologies it causes.
