Helicopter to spray thick brown liquid over Central Pennsylvania communities

(WHTM)– A helicopter will be flying across the Midstate on Thursday, spraying a liquid for black fly suppression.

The York County PA Office of Emergency Management announced that a low-flying helicopter will be spraying for black flies across the Midstate this week, per the PA Department of Environmental Protection.

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The Office of Emergency Management said the helicopter will be dispersing VectoBac 12AS, a Bti product manufactured by Valent Biosciences. The product is a bacterial larvicide used in Pennsylvania’s waterways to suppress flies, not a chemical…

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