Wayland Patch 6/7/13: How Do I Exclude My Property from Mosquito Spraying? The Wayland Board of Health has traditionally conducted mosquito control at the larvae level by treating Wayland’s marshy areas with an anti-larval. This year, however, the board has decided to conduct some spraying for adult mosquito control as well due to the increased occurrence of West Nile Virus, Eastern Equine Encephalitis (EEE) and mosquito-borne illness overall in the state last year, according to a press release from the board. Additionally, larviciding restrictions in areas of Great Meadows Wildlife Refuge also contributed to the decision.