Weeping Willow Trunk Holes: Borer vs. Sapsucker Damage

Two Distinct Causes

New home weeping willow with trunk holes—no visible insects, leaves present—has two likely causes:

1. Borers (beetle/moth larvae): Round holes, sawdust (frass), can kill tree if untreated.
2. Yellow-bellied sapsucker (woodpecker): Neat rows of ¼" holes, no frass, tree survives.

Critical Next Step

Hire an ISA Certified Arborist to inspect. Visual ID determines treatment:

• Borers → systemic insecticide (imidacloprid) or trunk injection.
• Sapsucker → deterrents (netting, reflective tape); no pesticide needed.

Why Professional ID Matters

Borers require urgent treatment; sapsucker damage is cosmetic. Misdiagnosis wastes money or loses the tree. Arborist assessment is cost-effective insurance.