Box Tree Moth

Characteristics

Box Tree Moth (Cydalima perspectalis) is an invasive pest that feeds on boxwoods. In its juvenile stage as a caterpillar, Box Tree Moth is capable of killing mature Boxwoods in as little as three weeks. The caterpillars are green with black stripes and white spots, and grow to about an inch and a half in length. Box Tree Moth will have up to 2-3 life cycles in a growing season, and can require monitoring to detect feeding damage.

Signs & Symptoms

Box Tree Moth begin feeding when the caterpillars wake in early spring. Young caterpillars begin to feed on Boxwoods by feeding on leaves, and as they mature entire leaves can be consumed. After the leaves of the plant are consumed, Boxwoods will appear brown with little foliage, and will be covered in webbing from nesting caterpillars.

Treatment & Recommendations

Box Tree Moth is an aggressive pest and requires intervention to prevent them from damaging Boxwoods. Chemical control can be used to mitigate damage from this insect, but it is recommended that it be done in conjunction with fertilizer to maintain the health of the plant.

Treatment for this insect is typically annual and ongoing. For a permanent fix, removing and replacing Boxwoods may be necessary. Box Tree Moth exclusively feeds on Boxwoods, so replanting with other species of shrubs will remove their presence from your landscape.