Spotted Lanternfly inCumberland County, PASPOTTED LANTERNFLY GUIDE
Cumberland County — with Carlisle as its county seat and home to the Army War College — confirmed SLF in 2019, sitting squarely in the Cumberland Valley between Blue Mountain and South Mountain. This valley corridor has become one of the most SLF-heavy pathways in Pennsylvania, channeling populations west along I-81 and the PA Turnpike. The I-81/I-76 interchange is a major freight hub that reinforces SLF populations across the county as vehicles arrive from established infestations throughout the mid-Atlantic. The Yellow Breeches Creek — a prized Pennsylvania trout stream — and the Conodoguinet Creek corridor are significant monitoring zones where treatment restrictions near waterways add management complexity.
Highest activity zones
SLF Hotspots in Cumberland County, PA
Yellow Breeches Creek (trout stream under treatment restriction concerns)
Active zone
Carlisle Army War College campus
Active zone
I-81/PA Turnpike junction
Active zone
Conodoguinet Creek corridor
Active zone
South Mountain conservation corridor
Active zone
Primary SLF food source
Tree of Heaven in Cumberland County, PA
Tree of Heaven is established throughout the Cumberland Valley floor along I-81, the PA Turnpike, and road margins connecting Carlisle to surrounding communities. The Yellow Breeches Creek corridor has Ailanthus populations on stream banks where chemical treatment restrictions near trout habitat add management complexity. South Mountain conservation corridor road margins and the Conodoguinet Creek waterway edges have additional ToH concentrations fueling SLF spread across this valley-bottom agricultural landscape.
Identify Tree of Heaven →Local action resources
What To Do in Cumberland County, PA
Report a Sighting
Every sighting in Cumberland County, PA maps the invasion front. Report directly to PA 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 PA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full PA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Cumberland County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Cumberland County, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Cumberland County, PA.