The following organisms and viruses are declared to be pests when present under circumstances where they may be injurious to persons, property or the environment:
Wis. Admin. Code Department of Agriculture, Trade and Consumer Protection ATCP 29.02
See s. 94.69(1), Stats. A pesticide may be used against a "pest" only if it is registered and labeled for that purpose and used according to label directions. Pesticide use against certain "pests" may be limited by applicable law.