Home / Environment / Maryland Battles Invasive Moths and Lanternflies
Maryland Battles Invasive Moths and Lanternflies
16 Jun
Summary
- Box tree moth quarantine affects four Maryland counties, including Washington.
- Spotted lanternfly quarantine now state-level, impacting four additional counties.
- Both invasive species pose significant threats to local flora and agriculture.
Washington County, Maryland, is currently facing a dual threat from two invasive insect species: the box tree moth and the spotted lanternfly. As of March 2026, the box tree moth is under quarantine in Allegany, Frederick, Garrett, and Washington counties. This invasive pest, native to East Asia, primarily targets boxwood shrubs, causing rapid defoliation and potentially killing the plants by consuming their bark. Early infestations can be difficult to detect.
The spotted lanternfly, also an invasive species from eastern Asia, continues to be a concern. Its quarantine has been expanded to the state level, encompassing Dorchester, Saint Mary's, Somerset, and Worcester counties, in addition to Washington County, where it is considered heavily infested. While not dangerous to humans or pets, these planthoppers feed on plant sap, stunting growth and reducing crop yields. Residents are urged to inspect vehicles for both species and report sightings to the Maryland Department of Agriculture.
