Spotted Lanternfly inJuniata County, PASPOTTED LANTERNFLY GUIDE

Juniata County is one of Pennsylvania's smallest and most rural counties, nestled in the Juniata River Valley between Mifflin County to the west and Perry County to the south. SLF was confirmed here in 2023, marking continued westward expansion from the established infestation zones of central PA. Mifflintown, the county seat, and neighboring Port Royal sit along the Juniata River and US-322, the primary east-west route through the valley — and the most likely introduction corridor for SLF arriving from the Harrisburg metro area and Dauphin County to the east. The Norfolk Southern main line through the valley is a well-documented SLF spread pathway, as rail freight arriving from infested eastern counties carries egg masses on equipment and cargo. Thompsontown and Milford Township occupy the lower Juniata River corridor where river island habitats and riparian forests provide classic SLF dispersal terrain. With a population under 26,000 and limited municipal resources, Juniata County faces the challenge of monitoring a large rural landscape against a pest that is advancing from multiple directions — making early citizen reporting particularly valuable here.