Purple Stain in Fallen Oak Limb: Decay Fungi

Explanation

Purple discoloration between bark and wood on a dead limb is from decay fungi breaking down dead tissue. They don't attack living wood.

No threat to the living tree. Natural recycling process.

Trees: Tarmac Around Oak Trees Causes Root Suffocation and Bark Loss; Storing Acorns for Planting: Keep Them Cool and Dry; Oak Tree Fungus Management: Drainage and Cultural Controls; Oaks Falling with Internal Decay: Hazard Tree Assessment Needed; Oak Trunk Decay: Management and Structural Support; Transplanting Young Oaks in Mid-September: Wait for Leaf Drop; Oak Thinning for Acorn Production: Wildlife Management Guide; Prickly Balls on Live Oak: Harmless Insect Galls; Post Oak Pruning in Texas: Oak Wilt Prevention Timing; Optimal Pruning Time for Florida Oaks: Avoiding Oak Wilt

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