Spotted Lanternfly inFrederick County, VASPOTTED LANTERNFLY GUIDE
Frederick County surrounds Winchester — the largest city in the Shenandoah Valley — and was confirmed for SLF in 2022, making it one of the earliest Shenandoah Valley counties affected. The I-81 corridor is the dominant SLF spread vector here: running northeast-southwest through the length of the Shenandoah Valley, I-81 carries enormous freight and commuter traffic connecting Frederick County directly to the established Northern Virginia and Maryland infestation zones. The county's Shenandoah apple growing region represents one of the most economically important SLF-threatened agricultural landscapes in Virginia, with significant orchard acreage facing direct SLF feeding pressure. The Opequon Creek watershed and the Double Tollgate interchange area are priority monitoring zones as SLF populations consolidate across this gateway county to the Shenandoah Valley.
Highest activity zones
SLF Hotspots in Frederick County, VA
I-81 corridor (primary northeast-southwest spread vector)
Active zone
Winchester adjacent zone (largest Shenandoah Valley city)
Active zone
Double Tollgate area (I-81 / US-11 junction)
Active zone
Opequon Creek watershed
Active zone
Shenandoah apple growing region (significant orchard acreage)
Active zone
Primary SLF food source
Tree of Heaven in Frederick County, VA
Tree of Heaven is established along the I-81 corridor and US-11 road margins throughout Frederick County, creating primary SLF dispersal pathways through the heart of the northern Shenandoah Valley. The Opequon Creek watershed margins have Ailanthus colonization along riparian edges that extends SLF habitat from the highway zone into the surrounding agricultural landscape. Winchester area commercial road margins and the apple orchard district access roads near the Frederick County countryside are priority monitoring zones — ToH in hedgerows and field margins adjacent to premium orchard operations represents a direct threat to the county's most economically significant agricultural sector.
Identify Tree of Heaven →Local action resources
What To Do in Frederick County, VA
Report a Sighting
Every sighting in Frederick County, VA maps the invasion front. Report directly to Virginia Department of Agriculture and Consumer Services.
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 Virginia State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Virginia guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Frederick County, VA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Frederick County, VA.
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