Is all pesticide spraying in Massachusetts in response to West Nile virus?
No. Spraying to reduce adult mosquito populations has been done for many years in Massachusetts communities primarily to reduce nuisance mosquitoes. In addition, there have been occasional years when the risk of human Eastern Equine Encephalitis (EEE) has been significant and adulticide spraying has been used to control mosquitoes to reduce the risk of EEE. EEE is of concern mainly in the southeastern part of Massachusetts, in Plymouth, Bristol, and some portions of Norfolk Counties.
