Fungi on Oak

[treeseer]

On the subject of visual assessment, is there any way to tell the extent of internal decay based purely on the extent of bracket growth?

 

NO.

 

When is it acceptable to label a tree safe in a high frequency area, where drayadeus is found at the base but all other factors indicate that the tree is sound?

 

Never ok to label a tree safe. I've seen dozens as David showed where I.d. just hung out in the butt for decades. If one is asked to assess the tree, then the whole tree needs to be inspected, not just the associated fungi. Mitigation options would come next. Judgments on safety and soundness after mitigation come last, if at all. imo.