New Michigan box tree moth alert available in English and Spanish

Box tree moth (Cydalima perspectalis) is an invasive pest in Michigan that can defoliate and kill boxwood shrubs.

Residents' help in spotting and reporting this pest is critical, especially in areas outside the current quarantine zone.

Since first being detected in Michigan in 2022, box tree moth has spread and established itself in a 13-county area in southeastern and central Michigan. Visit the Michigan Department of Natural Resources Eyes in the Field website for current quarantine counties and reporting. Reports of box tree moth sightings within the quarantine counties are not needed.

The Michigan Department of Agriculture & Rural Development first implemented a quarantine on boxwood shrubs (Buxus spp.) in 2023. The quarantine helps prevent the spread of box tree moth by limiting the transport of boxwood shrubs. Within the regulated quarantine area, growers and retailers must comply with internal quarantine measures. Movement of boxwood from inside the regulated area to outside the quarantine zone also requires a signed compliance agreement.

For homeowners and landscapers, moving any boxwood material — including live or dead shrubs, trimmings and debris — is strictly prohibited. All Michigan residents are encouraged to monitor for infestations and dispose of plants properly, according to current regulations.

The updated Box Tree Moth Alert includes information on how to identify this invasive pest, as well as options for control and alternative landscaping options for Michigan homeowners and residents. The alert is now also available in Spanish. This alert adds to the list of existing Michigan State University Extension resources about box tree moth available at canr.msu.edu/tag/box-tree-moth. 

This article was originally published by Michigan State University Extension.