Box Tree Moth

The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) has confirmed the detection of the box tree moth (BTM) near the border of Hamilton and Clermont counties.

A local resident submitted a photo of the insect to the USDA earlier this month, resulting in trapping in the area. Two specimens captured were identified as the BTM.

The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) has confirmed the presence of box tree moth, Cydalima perspectalis, in the continental United States and is taking action alongside state partners and industry to contain and eradicate the invasive pest that was imported on nursery plants shipped from Ontario, Canada. The box tree moth can significantly damage and potentially kill boxwood plants if left unchecked. Between August 2020 and April 2021, a nursery in St. Catharines, Ontario shipped boxwood (Buxus species) that may have been infested with box tree moth to locations in six states—25 retail facilities in Connecticut, Massachusetts, Michigan, New York, Ohio, and South Carolina—and a distribution center in Tennessee. At this time, the pest has been identified in three facilities in Michigan, one in Connecticut, and one in South Carolina, and APHIS is working with state plant regulatory officials to determine whether other facilities may be impacted.

Members of the public can prevent the box tree moth from spreading. Please allow State or Federal agricultural officials to inspect your boxwood trees and place an insect trap if they visit your home. If you bought a boxwood plant within the last few months, please inspect it for signs of the box tree moth and report any findings to your local USDA office or State agriculture department.

In May of this year, USDA confirmed the presence of box tree moths in the U.S. The pests likely hitchhiked here via infested plant material imported from an Ontario, Canada nursery. APHIS has initiated an emergency response including a Federal Order [PDF, 162 KB] halting host material from crossing the border pending risk analysis. Here is a set of resources supporting identification of this pest to help protect America's boxwoods.

The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) has confirmed the detection of box tree moth (BTM) (Cydalima perspectalis) at two residences in Clinton located in Lenawee County. Although not a threat to Michigan’s natural resources, extensive feeding from box tree moth can lead to significant defoliation and death of ornamental boxwood.  In May 2021, potentially infested boxwood plants were shipped to retail locations in several states including six in Michigan. The pest was then identified in three of the six Michigan facilities. It is not known whether the box tree moth populations detected in Clinton are linked or if the pest entered the state through another pathway.