07/23/2026
🦋 PSA: Watch for Box Tree Moth Damage on Boxwoods
The Box Tree Moth is an invasive pest attacking boxwood shrubs. Its caterpillars can strip plants bare surprisingly fast, leaving brown, webbed, skeletonized foliage.
Signs to look for:
• Chewed or disappearing leaves
• Fine webbing inside shrubs
• Green/yellow caterpillars with black stripes and spots
• Rapid browning or defoliation of boxwoods
• Small white moths with brown borders fluttering around plants
What to do if you spot it:
✔ Inspect boxwoods regularly, especially inner branches
✔ Hand-remove caterpillars when possible
✔ Early treatment matters
Biological controls like Bt (Bacillus thuringiensis kurstaki) or other labeled insecticides can be effective against young caterpillars. This pest is in the Buffalo Area. We, at Buffalo Horticulture, use Bt or Btk when dealing with this invasive pest. 😃