Tuesday July 18 A hand application for black fly suppression will be conducted on Yellow Breeches Creek Monday July 17 and Tuesday July 18 in York and Cumberland Counties. The application will be conducted by a DEP biologist using a back pack sprayer in stream and from bridges. Tuesday July 18 An aerial black fly (gnat) suppression operation will be conducted today, July 18 on the Juniata River, Conewago Creek, Conodoguinet Creek, Sherman Creek and Tuscarora Creek. The operation will start mid-morning as the weather clears. The first flight will begin in Adams and York Counties and move up the Juniata River and end in Huntingdon County. Flights will be conducted in Adams, York, Cumberland, Dauphin, Perry, Juniata, Mifflin and Huntingdon Counties. The helicopter treating the Juniata River and creeks will be a red and yellow Bell 205 with the tail numbers N638HA.
The product being dispersed is Vectobac 12AS, which is a Bti product manufactured by Valent Biosciences. Bti is short for Bacillus thuringiensis var. israelensis, which is a bacterial larvicide, not a chemical, and is the only product used in Pennsylvania's waterways for black fly suppression. Vectobac 12AS is a thick brown liquid resembling chocolate milk. Attached is a copy of the Vectobac label and an SDS sheet in case you would need information on the product.