Spotted Lanternfly inMonroe County, MISPOTTED LANTERNFLY GUIDE
Monroe County sits at the geographic crossroads of SLF spread into Michigan, bordering Lucas County, Ohio (Toledo) to the south and Lake Erie to the east. Confirmed detections in 2024 make Monroe County a critical early-detection zone — I-75 runs the length of the county connecting Toledo directly to the Detroit metro, and this freight corridor is the most probable introduction vector. The River Raisin and Lake Erie shoreline provide natural dispersal pathways, while Dundee and Milan serve as agricultural hubs where orchards and vineyards could face early SLF pressure. Rapid reporting by Monroe County residents is essential to contain spread before populations reach the fruit-growing counties of Lenawee and Monroe's own agricultural interior.
Highest activity zones
SLF Hotspots in Monroe County, MI
Monroe City
Active zone
Dundee
Active zone
Milan
Active zone
Carleton
Active zone
Newport
Active zone
Primary SLF food source
Tree of Heaven in Monroe County, MI
Tree of Heaven is established along the I-75 right-of-way through Monroe County and along CSX and Norfolk Southern rail corridors connecting Toledo to Detroit. The River Raisin margins from Monroe City to Milan have riparian Ailanthus thickets, and post-industrial sites along the Lake Erie shoreline near Newport and Carleton harbor ToH populations. MDARD monitoring focuses on rail yards and highway rest areas as primary detection points.
Identify Tree of Heaven →Local action resources
What To Do in Monroe County, MI
Report a Sighting
Every sighting in Monroe County, MI maps the invasion front. Report directly to Michigan Dept of Agriculture & Rural Development (MDARD).
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 MI State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full MI guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Monroe County, MI. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Monroe County, MI.
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