caption freeform

Barrier Mosquitocide Notification Requirements

Illinois Pesticide Act Amendments & Barrier Mosquitocide Application Notifications

Amendments to the Illinois Pesticide Act (effective January 1, 2023) include provisions to assist residents in obtaining information about applications at adjacent or abutting properties. State law requires applicators to erect signage alerting neighbors to the barrier mosquitocide application. This signage should include the business name and phone number of the commercial applicator.

Neighbors may contact the commercial applicator directly to:

  • Request a copy of the product label, pesticide registration label, and safety data sheet for the applied product.
  • Request notification of future applications at that property. The commercial applicator will notify the requesting resident at least the day before a scheduled application and include the date and approximate time of the application.

These requests should be directed to the commercial applicator for the treated property, not the homeowner. Residents may request notification in writing, in person, by phone, or email. The request should include the following:

  • Name of the person to be notified
  • Phone Number
  • Address

In the event that the commercial applicator attempts to contact but cannot reach the requestor, written notice should be left at their residence.

Information for pesticide contractors applying barrier mosquitocide:

Recent amendments to the Illinois Pesticide Act effective January 1, 2023 may impact pesticide companies operating throughout the state. These amendments added definitions for barrier mosquitocides and barrier mosquitocide treatments, which are pesticides formulated to kill adult mosquitoes. These pesticides leave a residual mosquitocidal coating on natural or man-made surfaces. Commercial applicators of barrier mosquitocides must be licensed under the Act, and are required to have completed additional licensure and testing requirements established by the Department of Agriculture. Prior to making barrier mosquitocide applications, commercial applicators must receive a certificate of completion of mosquito training from the DOA through participation in a DOA-approved barrier mosquitocide training program. Online training is available from the University of Illinois Pesticide Safety Education Program (PSEP.)

The Act prohibits commercial applicators from applying a barrier mosquitocide between October 16 and April 14, although exceptions may be made in the event of significant need due to an overabundance of target mosquito populations. The Act also prohibits commercial applicators from applying barrier mosquitocides when wind speeds are equal to or exceed 10 miles per hour.

Additionally, individuals may not install or use any residential automatic pesticide misting system under the Act. This refers to devices that are installed around the exterior or grounds of residential dwellings and that spray pesticide solutions at timed intervals.

Please be advised that commercial applicators of barrier mosquitocides must immediately place signage indicating that residential properties have been treated. Applicators should place a lawn marker at points of entry, which must meet certain requirements, including the following text: LAWN CARE APPLICATION - STAY OFF GRASS UNTIL DRY - FOR MORE INFORMATION CONTACT: NAME AND BUSINESS TELEPHONE NUMBER.” The lawn marker may be removed on the day following the application. In addition, commercial applicators must provide a copy of the product labels upon request of a neighbor whose property abuts or is adjacent to the treated property.

Mosquitocide treatments made for public health purposes by a mosquito abatement district, public health department, or other unit of local government is exempt from this requirement. The Southlake Mosquito Abatement District, which serves Highland Park, provides advance notice of mosquito control applications to residents who have opted in for these notifications. Residents can be added to a list to be notified prior to future adult mosquito control applications and notify the District of water that may be potential breeding sites or high mosquito populations at the Resident Hotline at