The practice of filling tree cavity’s with cement is no longer an approved practice in the field of Arboriculture. The long term, negative affects of such practice has long since been researched and documented.
This tree’s cavity remained exposed as it has grown. There are instances where a tree trunk will grow around the cement – this causes stress on the tree and affects the structural integrity of the tree.
If you have questions about the treatment for a tree issue, please consult a licensed and certified Arborist.