Mosquito Spraying on Wednesday, September 8

Mosquito control truck – Image (c) FMC Corp.

East Middlesex Mosquito Control Project is planning to use a truck-mounted aerosol sprayer to reduce mosquito populations. Spraying will be done between sunset and 11:30 PM.

On Wednesday, September 8, 2021, spraying is scheduled in Bedford for neighborhoods west of Springs Road and South Road. Areas also included are roads in the vicinity of Gould Road, Dunster Road, and Francis Kelley Road.

If postponed, the area will be rescheduled for Thursday, September 9, 2021.

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 dusk. Zenivex E4 biodegrades rapidly and therefore 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 at the Project website at

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