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Pine Top Dieback: Leader Loss, Weevil vs. Beetle Diagnosis, and Recovery

Top ¼ Dead = Leader Loss

Tree survives; a lateral branch becomes new leader (creates permanent crook). Young trees recover better than old.

Diagnose Cause

  • White pine weevil: Kills leader, shepherd's crook curl. Common.
  • Lightning: Vertical bark strip, sudden.
  • Bark beetles (engraver): Small pitch tubes (pencil eraser size) on bark. SPREADS DOWNWARD → kills tree.

Action Plan

  1. Cut dead top off at live wood (prevents falling hazard).
  2. If NO pitch tubes: spray trunk high as possible with Onyx (bifenthrin) or permethrin.
  3. If pitch tubes PRESENT: tree likely lost; remove before beetles spread.

Monitoring

Watch for new leader dominance. Fertilize lightly next spring to support recovery.

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