Norfolk County Mosquito Control District

04/21/2026

We are planning on conducting our annual Spring Aerial Larvicide application any time between April 22-30, 2026. Check back here for more specific dates/time as this is highly dependent on weather (no rain, light wind). This is NOT a spray, it is a granular product applied directly to the wetlands. For more information, and a map of the targeted wetlands, please see norfolkcountymosquito.org/aerial-larvicide-map.

Zoom and pan map to see the wetlands (shown in green) targeted for aerial treatment scheduled for sometime between April 22-30, 2026, weather permitting. The product used in this application is VectoBac GS, (label, SDS )a bacterial larvicide (bacillus sphaericus) on a granular corn cob…

02/04/2026

Over the next couple of weeks, you may see our crew in your neighborhood. We are helping out our District towns by shoveling out buried fire hydrants as well as clearing catch basins so water will easily drain into them when the snow begins to melt.

08/20/2025

Today is World Mosquito Day! Come With Me: A Day in the Life of a Mosquito Control Professional

07/11/2025

Due to the heavy rainfall event this week, we will be conducting an aerial larvicide application on the Neponset River flood plain in the towns of Canton, Dedham, Norwood, Sharon, and Westwood on Sunday, July 13, 2025. The product used in this application is VectoBac GS, a bacterial larvicide (bacillus sphaericus) on a granular corn cob base. It is NOT a spray. Link to targeted areas:

Zoom and pan map to see the wetlands (shown in green) targeted for aerial treatment scheduled for May 28, 2025. The product used in this application is VectoBac GS, (label, SDS )a bacterial larvicide (bacillus sphaericus) on a granular corn cob base. It is not…

05/27/2025

Due to last week's heavy rain, we will be conducting an aerial larvicide application on the Neponset River flood plain in the towns of Canton, Dedham, Norwood, Sharon, and Westwood on May 28, 2025. The product used in this application is VectoBac GS, a bacterial larvicide (bacillus sphaericus) on a granular corn cob base. It is NOT a spray. Link to targeted areas:

Zoom and pan map to see the wetlands (shown in green) targeted for aerial treatment scheduled for mid to late April, 2025, weather permitting. The product used in this application is VectoBac GS, (label, SDS )a bacterial larvicide (bacillus sphaericus) on a granular corn cob…

05/21/2025

We have decided to postpone the start of our spray season until the week of June 2nd. The weather models are indicating temperatures will be too cool next week for effective spraying. If you have made a request for next week, that request will automatically carry over to the following week so there is no need to re-submit your request.

04/24/2025

Today we are continuing Spring Aerial larvicide application by helicopter. We will be finishing up some areas west of Interstate 95 this morning, but the most of the work will be east of Interstate 95 today. Please see https://norfolkcountymosquito.org/aerial-larvicide-map/ to see which wetlands we are targeting. This is NOT a spray, it is a granular product called Bti that only gets applied to the wetlands. Please see https://norfolkcountymosquito.org/products/ for more information.

The NCMCD uses larvicide (to target immature mosquitoes) and adulticide (to target flying adults) products to control mosquito populations and vector-borne diseases such as West Nile virus and Eastern Equine Encephalitis. Larvicide The larvicide products used include Bacillus thuringiensis israelens...

04/23/2025

It's that time of year! We have begun our Spring Aerial larvicide application by helicopter. Today we will be concentrating on areas west of Interstate 95 and will continue into the eastern areas tomorrow. Please see https://norfolkcountymosquito.org/aerial-larvicide-map/ to see which wetlands we are targeting. This is NOT a spray, it is a granular product called Bti that only gets applied to the wetlands. Please see https://norfolkcountymosquito.org/products/ for more information.

The NCMCD uses larvicide (to target immature mosquitoes) and adulticide (to target flying adults) products to control mosquito populations and vector-borne diseases such as West Nile virus and Eastern Equine Encephalitis. Larvicide The larvicide products used include Bacillus thuringiensis israelens...

08/05/2024

A reminder to everyone to please make sure you empty any containers in your yard that may be holding water. Bird bath water should be changed at least once a week. This is the time of year that West Nile Virus becomes more prevalent, and with more frequent rain occurring, it is important to remove any standing water in those containers.

05/22/2024

Everything you ever wanted to know about mosquitoes and the Norfolk County Mosquito Control District, featuring our entomologist, Kaitlyn O'Donnell on Quincy Access TV.

A conversation with entomologist Kaitlyn O'Donnell about the Norfolk County Mosquito Control District, its history and purpose, and a discussions about local...

05/08/2024