HAGERSTOWN, MD (July 10, 2018) – Washington County Government would like to notify all citizens that the Maryland Department of Agriculture , in partnership with the Department of Natural Resources , will treat a targeted area of the Potomac River in Washington County. This is part of the Black Fly Suppression Pilot Program to control black fly populations in the area. Treatment is scheduled for Wednesday, July 11, beginning at 8 a.m.

The department will apply a Bacillus thuringiensis israelensis (Bti)-based larvicide via helicopter (Bell 206 Long Ranger, green and white paint scheme. Tail number N641HA). Bti is a naturally occurring bacteria found in soils worldwide. It is a bacterial insecticide, not a chemical, and is only harmful to a very limited variety of organisms including midge, black fly, mosquito larvae and a few other aquatic Dipteran (flies) insects.