Wis. Stat. § 94.715: Pest management for schools.

(1) Definition. In this section, “pesticide” has the meaning given in s. 94.67 (25), except that “pesticide” does not include a germicide, sanitizer, or disinfectant.

(2) Requirements for school boards. A school board shall do all of the following:

(dm) Authorize pesticide application in a school or on school grounds to be conducted only by persons who are certified in the applicable pesticide use categories under s. 94.705.

(g) Post notice of each pesticide application in a school or on school grounds at the time of the application and for at least 72 hours following the application.