The box tree moth, an invasive species known for its destructive habits on boxwood shrubs, has been detected for the first time in Pennsylvania, with sightings confirmed in two Erie County cemeteries. As boxwoods are a high-value ornamental shrub often found in Pennsylvania's public gardens and parks, the pest poses a significant threat to the local horticulture industry and landscape aesthetic. As reported by the Pennsylvania Department of Agriculture, a quarantine has been implemented in an effort to contain the spread and educate the public on identification and control measures.
"This insect does not harm humans or threaten our food supply," Agriculture Secretary Russell Redding told the Pennsylvania Department of Agriculture.“It threatens livelihoods in our nursery and landscape industry, as well as the parks and gardens that enrich our communities and feed tourism dollars into our economy. Protecting communities and businesses from economic loss is a top priority of the Shapiro Administration.” The economic stakes are high, with over $4.1 billion generated annually and more than 63,000 jobs at risk due to this winged pest.
Native to East Asia, the box tree moth has previously established its presence in other North American regions, including nearby states like New York and Ohio, as well as Ontario, Canada. The insect is notorious for the damage it inflicts on boxwoods, a preferred decorative hedge and topiary which enjoys the status of being the U.S.'s largest-selling evergreen shrub. Its rapid spread is chiefly facilitated through the commercial movement of infected plants, necessitating increased vigilance and strict quarantine measures.
In confronting this issue, early detection remains pivotal. Homeowners and businesses are urged to familiarize themselves with the box tree moth's appearance and symptoms of infestation. If suspected signs are observed, individuals are encouraged to report them via [email protected] or call the hotline at 1-888-253-7189, said the department, providing details on the insect's life stage and any apparent damage, preferably accompanied by photographs. This can help prevent the significant economic loss heralded by the moth's presence.
As part of the containment strategy, Erie County’s plant merchants are required under quarantine to prevent the sale of boxwood from leaving the county, unless involved in a compliance agreement with the PA Department of Agriculture. This agreement enforces a standard protocol, including surveying, treatments, and meticulous record-keeping for any out-of-county shipments. Information on entering into a compliance agreement can be obtained by contacting the department's regional office at 814-332-6890 to arrange a meeting with an inspector.
