Hollow Storm-Damaged Trees: Insects Are Secondary, Boost Vigor

Many storm-damaged trees in South Texas have hollow trunks, insects/ants inside. How to ensure longevity?

Hollows Are Normal

• Heartwood decay = dead wood; living cambium intact.
• Tubular structure = strong. Tree not “dying.”
• Insects feed on fungi/decay, not living tissue.

Action

• Spray hollows with carbaryl (Sevin) if insects annoy you—not needed for tree health.
• Fertilize: 10-10-10 at 1 lb/inch trunk diameter, scattered, watered in (before rain).
• Monitor for large dead limbs over targets; prune if hazardous.

Bottom Line

Hollow storm trees are fine. Insects are scavengers. Fertilize for vigor; prune only hazards.