Spotted Lanternfly inAdams County, PASPOTTED LANTERNFLY GUIDE
Adams County — confirmed for SLF in 2020 — is home to Gettysburg National Military Park, one of the most visited historic sites in the United States with approximately 1.5 million visitors per year. The volume of tourism traffic to Gettysburg creates significant SLF dispersal risk, as visitors move between the battlefield and surrounding counties. Adams County is also Pennsylvania's top apple-producing county, with over 3,000 acres of orchards facing direct SLF feeding pressure on fruit trees. Eisenhower National Historic Site, South Mountain State Forest, and the Codorus Creek headwaters round out the county's highest-priority SLF monitoring zones.
Highest activity zones
SLF Hotspots in Adams County, PA
Gettysburg National Military Park (historic trees under SLF pressure)
Active zone
South Mountain State Forest
Active zone
Adams County apple orchard district
Active zone
Codorus Creek headwaters
Active zone
Caledonia State Park
Active zone
Primary SLF food source
Tree of Heaven in Adams County, PA
Tree of Heaven is present along the road margins and field edges surrounding Gettysburg National Military Park, where the combination of historic trees and Ailanthus colonization creates a complex SLF management challenge on nationally significant grounds. South Mountain State Forest edges and Caledonia State Park road margins have additional ToH populations extending SLF habitat into the county's forested western corridor. The apple orchard district's proximity to ToH-colonized road margins makes Adams County a high-priority agricultural monitoring zone as SLF populations continue to expand across this fruit-growing landscape.
Identify Tree of Heaven →Local action resources
What To Do in Adams County, PA
Report a Sighting
Every sighting in Adams 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 Adams County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Adams County, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Adams County, PA.