Weeping Cherry Sap Ooze After String Girdling: Bacterial Infection Management

Understanding the Damage

A string left around a weeping cherry trunk until it embedded in bark caused girdling injury. The resulting sap ooze, worsened after string removal, with browning leaves, suggests bacterial infection (likely Pseudomonas or Erwinia) entering the wound. Alcohol-like odor and insect attraction confirm fermentation.

Treatment Attempt

Apply copper-based bactericide/fungicide (Hi-Yield Copper Fungicide) to the wound and surrounding bark per label. Copper suppresses bacterial progression but cannot reverse established vascular damage.

Realistic Outlook

• Tree may survive for years with chronic ooze.
• Monitor for structural weakness at injury site.
• Do not wrap or seal the wound—air drying is essential.
• Water and fertilize to maintain vigor.

Prevention: Never leave ties, wires, or strings on trees—use expandable straps checked annually.