Prohibit Chlorpyrifos Poisoning Students Act of 2018 This bill regulates restricted use pesticides. Specifically, the bill requires certified applicators of restricted use pesticides to submit a quarterly report to the Environmental Protection Agency (EPA) documenting all use of those pesticides. The EPA shall make publicly available a summary of those reports. The bill also requires certified applicators of restricted use pesticides to post signage in the area in which an application is to occur not later than seven days before the application. The bill prohibits: (1) any pesticide containing chlorpyrifos (unless a temporary permit is granted to a certified applicator), and (2) application of a pesticide classified for restricted use, or an organophosphate pesticide, on or within a buffer zone of a school property.