Tuesday June 20 A hand application for black fly suppression will be conducted on Yellow Breeches Creek Tuesday, June 20 in York and Cumberland Counties. The application will be conducted by DEP biologists using a back pack sprayer in stream and from bridges.
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.