Richmond, Virginia – The Virginia Department of Agricultural and Consumer Services (VDACS) has confirmed the presence of a new invasive insect in the state: the Box Tree Moth.
Inspectors found this pest, scientifically named Cydalima perspectalis, in four locations across Clark and Loudoun counties. This is the first time this species has been identified in Virginia, although it has already been reported in several other states.
According to officials, boxwoods, which are popular ornamental plants in Virginia, face a significant threat from this moth. The caterpillars have a voracious appetite, quickly stripping leaves from boxwoods. If not managed, such an invasion could lead to the death of the plants.
VDACS stated that if the presence of the moth is confirmed in any facility, they would treat the affected boxwood plants accordingly.
Identifying the Box Tree Moth
This moth, native to East Asia, primarily feeds on box trees and related boxwood species. According to an Ohio State University report, the caterpillars are lime green with a black head and have “short, hard hair.” They start with dark stripes that deepen in shade, eventually revealing yellow stripes.
The mature moths are largely white, often with brown edges on their wings. Sometimes, they appear completely brown with white spots.
When inspecting boxwoods, it’s essential to look for brown or missing leaves, as the caterpillars tend to hide among the foliage. The moths are generally more active at night.
Where Has the Box Tree Moth Been Found in the U.S.?
The Box Tree Moth has become a significant pest in Europe and was first spotted in the U.S. in 2021, in New York. Since then, it has spread to multiple states, including Connecticut, Delaware, Massachusetts, Michigan, Ohio, Pennsylvania, South Carolina, and Maryland.
In Europe, the rapid spread of this moth is thought to be due to the abundance of susceptible boxwoods and a lack of natural predators. Furthermore, since boxwoods are not indigenous to North America, their natural defenses are weak.
Officials in affected states have imposed quarantines to slow the spread of the Box Tree Moth. For instance, discovery of a “breeding population” in Wisconsin could trigger quarantine measures for that area. In cases where even one moth is found, any potentially infected plants may be destroyed.
Early detection and prompt action are vital in managing invasive species.
What Should You Do If You Spot a Box Tree Moth or Its Caterpillars?
Virginia officials are encouraging residents to report any signs of damage on boxwood plants through their online portal. Meanwhile, in Wisconsin, residents, nurseries, and landscapers who do not have moth presence are urged to report any suspicious findings.
In states that have dealt with this moth for some time, authorities continue to welcome reports of suspected infestations.
Officials in West Virginia suggest using the natural pesticide Bacillus thuringiensis kurstaki (BTK) and other insecticides labeled for Box Tree Moth control. However, it is advisable to check whether you need to report any suspected infestation in your area before applying pesticides.
