Hypoxylon Canker on Holly Tree: Gas Leak Connection?

Texas tree with red summer berries shows black bark areas, bark loss, dead branches after severe drought. Gas leak near tree 3 years ago. Owner asks if salvageable.

Identification

Tree = American holly. Black crusty areas = Hypoxylon canker (opportunistic fungus attacking stressed trees).

Gas Leak Role

Unclear. Hypoxylon typically exploits long-term stress (drought, root damage, compaction). Gas leak may have contributed but fungus likely active longer.

Decision Framework

• No curative treatment.
• Monitor: increasing dead branches = hazard.
• Consult certified arborist or Texas Forest Service for risk assessment.
• Reference: Hypoxylon fact sheet.

Removal is judgment call based on structural risk, not fungal contagion.