How do you inform farm workers, scouts and others about the Restricted Entry Interval (REI) of pesticides you use? The REI is the period of time after a pesticide has been applied that workers or anyone else must not do hand labour tasks in that treated area. One way to inform everyone of REIs is to post signs at any entrance into treated areas. In collaboration with government and industry leaders, the Ontario Pesticide Education Program (OPEP) has available 2 designs of ready-to-use signs that growers can purchase to inform others to stay out of treated areas.