Mosquito Abatement Program

mosquito abatement program
For Questions Contact:
Kristyn Wilson |
Job Title
Public Works Clerk
kristynw [at]
| ext.

Larvicide Program (2024)

A spring application of the larvicide is planned to be conducted by helicopter to stagnant water within 2 km of the Town of Parkhill, Village of Ailsa Craig, and the Hamlet of Nairn to control the larval stages of mosquitoes. The Spring Aerial mosquito program is timed to control the snow-melt mosquitoes and the early summer larva. 

This biological larvicide contains the active ingredient “BTI” and is very specific to mosquito larva (information regarding the product can be found below). The application is weather-dependent and will take place between April and June, dates to be confirmed.

Larvicide Application Process

The Spring Aerial mosquito program is timed to control the snow-melt mosquitoes and the early summer larva.  The program can provide control typically into May with the aerial application. The rest of the season is dependent on precipitation, and once into June, the tree cover starts to interfere with the effectiveness of the application by air.

If any standing water flooding is found in May/June time frame, please report to Morgan Tyler @email (519) 831-4750, Pestalto Environmental Health Services Inc. Unfortunately, after the larva has emerged into adult mosquitoes, there aren't any biological controls that will work.

When early summer arrives, the Middlesex-London Health Unit (MLHU) monitors and controls vector mosquito species to reduce the spread of West Nile Virus (WNV) and other vector-borne diseases such as Eastern Equine Encephalitis (EEE). The MLHU performs surveillance and sampling at about 250 standing water sites located on public property throughout Middlesex-London. Visit their website to learn more about MLHU's Mosquito Surveillance, Control and Standing Water.

Larvicide Program 2024

February 15th, 2024

  • Notice of Aerial Application of Larvicide for Mosquitoes mailed to affected landowners.

March 15th, 2024 12:00pm  

  • Land owner objection forms due to be returned​​ to the municipality

March 25th - June 30th 

  • First Larvicide application, on days when weather permit
Spray Application Maps 

Additional Resources

North Middlesex Area Boundary Maps
Learn More About BTI


If you require information in regards to the Mosquito Control Program, you may contact:

Morgan Tyler, Pestalto Environmental Health Services Inc.

Email: @email

Phone: (519) 831-4750