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2013 News

Pennsylvania DEP Officials to Conduct Black Fly Spraying June 21 in Delaware River Basin

June 20, 2013

Helicopter to Appear between Easton, PA and Yardley, PA

On Friday, June 21, 2013, Pennsylvania Department of Environmental Protection (DEP) aerial black fly suppression operations will be conducted on the Delaware River from Easton/Philipsburg south to Yardley/Trenton.

Operations on the Delaware will begin after noon and work will be conducted from the Easton area south toward Yardley.

Typical operations involve the application of Vectobac 12AS (a brown, viscous, liquid material that smells like fish oil) from a helicopter. The helicopter will apply the Vectobac perpendicular to the river flow in designated areas by flying back and forth across the river and discharging the material from a boom arm. The material is then carried downriver. The active ingredient in Vectobac is Bacillus thuringiensis israelensis (B.t.i.), a naturally occurring soil bacterium.

This work is conducted to kill black fly larvae before the adult black flies (also known as gnats) can emerge from the rivers. AgAir, LLC of Thomasville, PA is the scheduled contractor and will be using a Bell Jet Ranger with tail number N16979.