ANNAPOLIS, MD (June 25, 2024) ~ Annapolis, MD - The Maryland Department of Agriculture (MDA) has announced a new pilot program in partnership with the Department of Natural Resources to control black fly populations in the Potomac River near Harpers Ferry, West Virginia. The treatment is scheduled to take place on Wednesday, June 26, 2024.

The MDA will be using a Bacillus thuringiensis israelensis (Bti)-based larvicide, which will be applied via helicopter. The helicopter, a Bell 206 Long Ranger with a green and white paint scheme and tail number N641HA, will target a specific area of the river. Bti is a naturally occurring bacteria found in soils and is known for its effectiveness in controlling insect populations.

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According to MDA officials, Bti is not harmful to humans or other aquatic life such as fish, crabs, or other invertebrates. However, it may cause temporary discoloration of the water. A fact sheet on Bti can be found on MDA's website for those seeking more information.

The Black Fly Suppression Pilot Program was established in 2016 and has been successful in controlling black fly populations in other areas. For more information on the program and its progress, interested individuals can visit MDA's website. This pilot program serves as an important step towards managing black fly populations and ensuring the health and safety of both humans and aquatic life in the Potomac River area.

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