Monitoring — Confirmed 2023
Spotted Lanternfly inIllinois2026 Status & What To Do
Illinois confirmed SLF in 2023 near Chicago. The Chicago metro's dense tree-of-heaven corridors provide ideal habitat for rapid spread.
Where it's confirmed
Key Affected Areas
CookDuPageLakeKaneWill
Local action resources
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IL Department of Agriculture has quarantine maps, treatment guides, and permit info for Illinois.
IL Department of Agriculture →Season-by-season tactics
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