Spotted Lanternfly inLycoming County, PASPOTTED LANTERNFLY GUIDE
Lycoming County — with Williamsport as its county seat — confirmed SLF in 2018 and presents a unique SLF spread risk because of the Little League Baseball World Series, held every August in Williamsport. The LLBWS draws tens of thousands of visitors from across the United States and internationally, including from heavily infested states, during peak SLF adult season — creating a high-profile seasonal transport event that concentrates vehicle-mediated spread risk in a single week. The West Branch Susquehanna River corridor is a major SLF spread pathway through the county, and the I-180 freight route has accelerated SLF establishment from the east. Loyalsock State Forest and Jersey Shore borough round out the county's key monitoring zones.
Highest activity zones
SLF Hotspots in Lycoming County, PA
Williamsport Little League Baseball World Series complex
Active zone
West Branch Susquehanna River corridor
Active zone
I-180 freight corridor
Active zone
Loyalsock State Forest edge
Active zone
Jersey Shore borough (Susquehanna waterfront)
Active zone
Primary SLF food source
Tree of Heaven in Lycoming County, PA
Tree of Heaven is established along the West Branch Susquehanna River corridor and I-180 road margins throughout Lycoming County. The Williamsport waterfront and the Little League Baseball World Series complex access roads are priority monitoring zones given the concentration of out-of-state vehicle traffic during peak SLF adult season every August. Loyalsock State Forest access roads and the Jersey Shore borough Susquehanna waterfront margins have additional ToH populations that extend SLF host habitat through the county's most important ecological and agricultural landscapes.
Identify Tree of Heaven →Local action resources
What To Do in Lycoming County, PA
Report a Sighting
Every sighting in Lycoming 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 Lycoming County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Lycoming County, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Lycoming County, PA.