Spotted Lanternfly inMifflin County, PASPOTTED LANTERNFLY GUIDE
Mifflin County — confirmed for SLF in 2018 — occupies the Juniata River Valley in central Pennsylvania, where the Juniata River and its tributaries drain an elongated agricultural valley flanked by Tuscarora Mountain and Jacks Mountain ridges. Lewistown, the county seat, anchors a population of approximately 47,000 in a landscape where agriculture on the valley floor and ridge-and-valley topography create both SLF habitat diversity and monitoring complexity. The PA Route 322 corridor serves as the primary east-west transport artery through the county, connecting Mifflin County to the established Dauphin and Centre County infestation zones. The county's limited urban resources for public outreach mean that SLF education and early detection depend heavily on engaged rural and agricultural communities across the valley floor.
Highest activity zones
SLF Hotspots in Mifflin County, PA
Juniata River Valley floor corridor
Active zone
Lewistown borough downtown area
Active zone
PA Route 322 transport corridor
Active zone
Tuscarora Mountain ridge approach zones
Active zone
Agricultural valley floor farmland
Active zone
Primary SLF food source
Tree of Heaven in Mifflin County, PA
Tree of Heaven is established along the Juniata River Valley floor and PA Route 322 road margins throughout Mifflin County, creating SLF dispersal pathways from the established Cumberland and Dauphin County infestation zones westward into this agricultural valley. The Lewistown borough area stream corridors and rail rights-of-way have Ailanthus colonization that supports SLF establishment in the county's population center. Tuscarora Mountain ridge approach roads and the valley floor agricultural field margins are priority monitoring zones as SLF populations continue to advance through this central Pennsylvania river valley landscape.
Identify Tree of Heaven →Local action resources
What To Do in Mifflin County, PA
Report a Sighting
Every sighting in Mifflin County, PA maps the invasion front. Report directly to Pennsylvania Department of Agriculture.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full Pennsylvania State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Pennsylvania guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Mifflin County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Mifflin County, PA.
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