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From PA DEP The Pennsylvania Department of Environmental Protection (DEP) began its 2021 Black Fly Suppression Program this week. The program involves aerial and backpack spraying on roughly 1,700 stream miles in 35 counties of the commonwealth. “Black flies are a seasonal pest that can cause emotional stress to people seeking outdoor recreation,” said DEP Secretary Patrick McDonnell. “This initiative reduces the black fly population so that Pennsylvanians and visitors can fully enjoy our natural resources.” This year, 48 rivers and streams spanning more than 1,700 miles will be monitored and treated as needed. Spraying activities will be performed both by helicopter and ground crews. The frequency will depend on weather and biological conditions. Treatments cannot occur during periods of heavy rain or when water levels are high as these conditions lower the effectiveness of the treatment and significantly increase the cost of the control operations.

United statesPatrick mcdonnellFly suppression programPennsylvania department of environmental protectionPennsylvania departmentEnvironmental protectionFly suppressionDep begins 2021 black fly suppression programஒன்றுபட்டது மாநிலங்களில்பேட்ரிக் மக்டொநெல்ஈ அடக்குமுறை ப்ரோக்ர்யாம்பென்சில்வேனியா துறை ஆஃப் சுற்றுச்சூழல் ப்ரொடெக்ஶந்பென்சில்வேனியா துறைசுற்றுச்சூழல் ப்ரொடெக்ஶந்ஈ அடக்குமுறை