Borer Beetles in Weeping Willow: Trunk Spraying and Larval Excavation

Situation

3 weeping willows (Cincinnati). One: borer holes (dark spots 1–1.5") in bark. Tree healthy, watered.

Treatment

1. Spray trunk with borer-specific insecticide (local nursery). Repeat weekly.
2. Mechanical: Use knife to dig into bark/wood at attack sites; kill larvae. Spray wound after.

Reference

Poplar & willow borer info: https://oregonstate.edu/Dept/nurspest/poplar_and_willow_borer.htm