Spotted Lanternfly inPerry County, PASPOTTED LANTERNFLY GUIDE

Perry County is a largely rural, forested county in south-central Pennsylvania, sitting between Cumberland County to the south and Juniata County to the north along the Susquehanna River. SLF was confirmed here in 2022, with spread most likely arriving from the heavily infested Cumberland Valley counties along the US-11/15 corridor. Duncannon, at the confluence of the Susquehanna and Juniata rivers, is a key entry point: the elevated river bluffs and rail corridors passing through Duncannon have long served as natural SLF movement pathways in similar topographic settings. New Bloomfield, the county seat, sits in a rural interior valley where detection remains challenging due to limited monitoring resources. Newport and Millerstown along the Juniata River benefit from proximity to PSU Extension resources but face constant reintroduction pressure from infested Cumberland County to the south. Perry County's rural forested landscape, while less densely infested than valley counties, represents expanding SLF range into interior Pennsylvania — a trend that bears close monitoring as populations consolidate.