Weeping Willow Borer Damage: Late-Season Systemic Treatment

Situation

One of two 4-year-old willows has severe borer damage (leaning trunk removed, ongoing decline). The other has minor damage. Spraying and plugging failed.

Last-Ditch Systemic Option

If the declining tree still has green foliage, apply Bayer Advanced Tree & Shrub Insect Control (imidacloprid) as a soil drench NOW. Roots may translocate enough insecticide to kill remaining borers and prevent new attacks this season.

Product: Bayer Advanced Insect Control

Decision Point

• Little green left → Remove tree; it's a hazard.
• Reasonable canopy → Try soil drench; willows grow fast and may outgrow damage if borers are stopped.

For the Healthy Tree

Apply soil drench annually in early spring as preventive. Willows are borer magnets when stressed.