Leaf Skeletonizing on Bloodgood Japanese Maple: Trumpet Skeletonizer or Minor Damage?

Identifying the Pest

Small holes and abraded leaf layers with green veins intact suggest maple trumpet skeletonizer (Epinotia aceriella). Larvae feed between epidermal layers, leaving a translucent "window."

Why It's Likely Minor

Damage appears late season (July-August second generation). By then, the tree has completed most annual growth. If <50% leaf surface remains, health is unaffected.

Management

• No spray needed if damage is light and larvae gone.
• Bt spray only if active caterpillars present on new growth next spring.
• Maintain vigor: Mulch, deep water, avoid nitrogen excess.

Nursery Confirmation

Widespread occurrence on Bloodgood (not finer-leaf cultivars) suggests cultivar susceptibility, not epidemic.