Helicopter Application to Control Mosquito Larvae

Published April 12, 2024 | East Middlesex Mosquito Control Project | Automatically Archived on 4/27/2024

This Post has been archived and its content might be outdated. If you are looking for recent content, please check this Site's Homepage.


The East Middlesex Mosquito Control Project will be conducting a helicopter application of the biological larvicide, Bti (Bacillus thuringiensis var. israelensis), to control mosquito larvae in Bedford, Belmont, Burlington, Lexington, Maynard, Medford, North Reading, Reading, Sudbury, Waltham, Wayland, Wellesley, and Weston.  One helicopter application will take place between April 16, 2024 and April 17, 2024. The Bti will be applied in a granular formulation by a helicopter flying low directly over the wetlands. Residents do not need to take any special precautions for this application.


Bti is a natural occurring bacterium found in soil, and is classified by the EPA as relatively non-toxic. Bti is target specific and only affects mosquito larvae and a few closely related aquatic insects in the fly family. Bti breaks down quickly in the environment. The product to be used is VectoBac GS (EPA Registration #73049-10).


For further information contact the East Middlesex Mosquito Control Project at