Mosquito Spraying Planned for Tuesday

September 1, 2023

The East Middlesex Mosquito Control Project is planning to use a truck mounted aerosol sprayer to control mosquito populations. Spraying will be done between sunset and 11:30 p.m.

The following paragraph is intended to provide a general description for where mosquito spraying will take place. The spray route will include many more roads than are listed below.

On Tuesday, Sept. 5, spraying is scheduled for areas of Bedford that are located in the vicinity of Concord Road, Davis Road, Carlisle Road, Dudley Road, North Road, Wildwood Drive, Gould Road, Washington Street, Winthrop Avenue, Marion Road, Evergreen Avenue, Short Street, Alaska Avenue, Ridge Terrace, Dunelm Road, Ledgewood Drive, Meadowbrook Road, and Sweeney Ridge Road.

If postponed, spraying will be rescheduled for the following week.

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The mosquito control product being used is Zenivex E4 (EPA Reg No. 2724.807), and it’s being applied at 1 oz per acre. Zenivex E4 is a non-ester pyrethroid and is classified by the EPA as a reduced risk pesticide. Mosquito control applications of Zenivex E4 do not pose a significant risk to people or their pets due to the low toxicity and the small amount used to control mosquitoes.

As with any pesticide, people should minimize their exposure. If residents see a spray truck approaching, they are advised to go indoors for a few minutes while the spray dissipates. Residents are also advised to close windows. Beekeepers do not need to take any special precautions since spraying begins after sunset. Zenivex E4 biodegrades rapidly and doesn’t build up in the environment. 

If residents have any questions related to mosquitoes or mosquito control, contact the East Middlesex Mosquito Control Project at 781-899-5730. The spray schedule can be found on the Project’s website at

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