In Illinois, those who apply pesticides for agricultural purposes must be at least 16 years old and pass a written exam. Training is available from the University of Illinois Extension, but is not required. In most states, including Illinois, pesticide applicators must renew their licenses every three years.
For specific information about pesticide licensing, contact:Illinois Department of Agriculture
801 E. Sangamon Ave, Springfield, IL 62702-1813
Phone: 217.782.2172, Fax: 217.785.4505