Sapsucker holes bleed sap that ferments, attracting insects. Rain or a hose washes it away. The tree heals itself.

Weeping Cherry Gummosis: Borer Management and Fruit Production
Rows of Holes in Holly Trunk: Sapsucker Woodpecker Damage and Management
Dealing with Borers in Plum Trees: Identification and Treatment
Maple Sap Dripping After Pruning: Normal or Aphids?
Rows of Holes on Bradford Pear: Sapsucker Activity
Sapsucker Holes in Live Oak: Not Borers, But Birds
Quarter-Inch Holes Ringing Oak Limbs: Sapsucker Damage, Not Borers
Clustering Insects on Tree Branches: Scale or Beetles?
Pine Tree Holes in Rows: Sapsucker Woodpecker Damage
Crabapple Sparse Blooms and Bark Craters: Atomic Grow for Insect Cleanup and Vigor
Bugs on Florida Tree Trunk: Likely Love Bugs or Similar, Not Harmful
Cottony Scale on Lime Tree: Merit Systemic or Soap/Oil for Bees' Honeydew Attraction
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