Bark Separation on Whitespire Birch: Internal Decay, Not Just Borers

Bark peeling away from the trunk on a 16-year-old Whitespire birch suggests internal decay from fungal/bacterial organisms entering through old wounds (storm damage, mower injury, ice cracks). Bronze birch borer may exploit weakened wood but is rarely the primary cause.

Management

• No cure for established decay; it's progressive.
• Optimize watering and fertilization to prolong vitality.
• Monitor for hazardous limbs; remove if they threaten structures.
• Avoid further trunk injury.

Consider replacement with a longer-lived species if decline accelerates.