Spotted Lanternfly inLoudoun County, VASPOTTED LANTERNFLY GUIDE
Loudoun County is one of the wealthiest and fastest-growing counties in the United States — and one of Virginia's most heavily SLF-affected counties since confirmation in 2022. The county presents an unusually high-stakes SLF landscape: Dulles International Airport is a major cargo hub with enormous freight volume from global supply chains, creating ongoing introduction risk from international pathways. Virginia wine country reaches its greatest concentration in Loudoun, with more than 30 wineries directly threatened by SLF feeding damage on Vitis vinifera vines. The county's signature horse farm estates in the Middleburg and Upperville areas face SLF pressure on shade trees and ornamentals. The Washington & Old Dominion Trail — one of the busiest rail-trail corridors on the East Coast — runs through the heart of the county and has become a significant SLF observation and spread corridor.
Highest activity zones
SLF Hotspots in Loudoun County, VA
Dulles Airport cargo hub and perimeter roads
Active zone
Virginia wine country (30+ wineries)
Active zone
W&OD Trail corridor
Active zone
Horse farm estates (Middleburg area)
Active zone
Route 7 / Route 50 commercial corridors
Active zone
Primary SLF food source
Tree of Heaven in Loudoun County, VA
Tree of Heaven is established along Loudoun County's stream corridors, road margins, and the W&OD Trail right-of-way, creating SLF dispersal pathways through the heart of Virginia wine country. The Dulles Airport perimeter roads and cargo freight areas have Ailanthus colonization adjacent to one of the region's highest-intensity freight nodes. Route 7 and Route 50 commercial corridor margins and the Goose Creek watershed have additional ToH populations that fuel SLF spread through the county's rapidly developing suburban and exurban landscape. Wine country road margins near Middleburg, Bluemont, and Purcellville are priority monitoring zones for this economically significant agricultural landscape.
Identify Tree of Heaven →Local action resources
What To Do in Loudoun County, VA
Report a Sighting
Every sighting in Loudoun 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 VA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full VA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Loudoun County, VA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Loudoun County, VA.
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