Invasive Box Tree Moth Found in Southern New Jersey
The state has quarantined boxwood plants in three counties to curb the spread of this destructive garden pest.
Updated on Sept. 26, 2026 in Gardening
Live Poll
Should the government restrict moving landscape plants to prevent the spread of invasive insects?
The New Jersey Department of Agriculture has confirmed the presence of the invasive box tree moth in the southern part of the state. Officials have responded by issuing a quarantine on the movement of boxwood plants and related debris in Cape May, Cumberland, and Atlantic counties.
Why it matters
The box tree moth larvae feed exclusively on Buxus species, and they can kill mature boxwood shrubs in just a single growing season. Because the pest lacks natural predators in new regions, it has the potential to threaten the local boxwood industry, which accounts for $9.8 million in annual economic activity.
The quarantine currently covers all movement of boxwood plants, debris, and dead material from Cape May, Cumberland, and Atlantic counties. This invasive pest, which was first detected in the U.S. in 2021, is currently present in ten other states.
The players
New Jersey Department of Agriculture
The state agency responsible for overseeing agricultural health, managing invasive pest responses, and issuing plant movement quarantines.
The details
The box tree moth spreads primarily through the trade and transport of infested nursery stock, where egg masses, larvae, or pupae hitchhike on container-grown plants. Once established, the larvae consume the leaves and bark of boxwood shrubs, often killing the entire plant quickly. Because these moths face few natural biological controls in new territories, their populations tend to grow rapidly if left unchecked.
Timeline
September 2026: The New Jersey Department of Agriculture confirmed the local detection.
2021: The moth was first detected within the United States.
2018: The moth was first detected in Toronto.
The Home Front
The arrival of the box tree moth in New Jersey follows the established 15-year pattern of the pest spreading through Europe. This development marks a significant challenge for local ornamental landscaping standards and regional agricultural stability.
If you live in Cape May, Cumberland, or Atlantic counties, avoid moving boxwood plants or trimmings to other areas to prevent further spread. Inspect your existing boxwood shrubs for signs of defoliation or the presence of larvae, and contact your local agricultural extension for guidance on management.
The takeaway
This invasive pest can decimate boxwood shrubs within a single season, making early identification essential for homeowners in the region. Monitor your shrubs closely for damage and consult with a local nursery professional regarding safe disposal of any infested plant material.
Further reading
For more tips on protecting your landscape, explore the Gardening section.
Source note: This article includes information reported by MyCentralJersey.
Live Poll
Should the government restrict moving landscape plants to prevent the spread of invasive insects?
