REGIONAL – From August 10 to 16, during daylight hours, residents in Salisbury, Newburyport, Newbury, Rowley, and Ipswich can expect to see helicopters flying low. The flights are part of a mosquito control program aimed at reducing the insect population.
The timing follows late July high tides that flooded salt marshes, creating ideal breeding conditions for mosquitoes. Eggs typically hatch quickly, with larvae peaking 7 to 10 days later. Officials say this week offers the best opportunity to treat the insects before they mature.
In 2024, Massachusetts recorded 19 cases of West Nile virus, significantly higher than the usual 10 to 12. While 2025 figures are not yet available, conditions suggest another active season.
The Northeast Massachusetts Mosquito Control District will apply VectoBac 12AS, a larvicide derived from natural bacteria. The product, sprayed directly over wetlands, targets mosquito larvae and some related aquatic insects. Officials say it is safe for people, pets, pollinators and wildlife.
For more information, contact District Director Barry Noone at 978-352-2800 or email at NEMMC@mass.gov.
