Aerial mosquito control spraying planned across Norfolk County wetlands in April
The Norfolk County Mosquito Control District will be conducting helicopter applications of the biorational larvicide Bti (Bacillus thuringiensis israelensis) to control mosquito larvae.
These applications will be conducted over a likely 2 to 4-day window, lasting only 2 days, anytime between April 20, 2026, and April 30, 2026. As always, the weather in the spring is unpredictable. For this reason, the District cannot pin down actual application dates with any more accuracy at this time. We will send out further notices as the application date approaches…