Ivy in oak tree. Harmful?
I have a 40+ year old live oak that has ivy growing up its trunk and branches. I have been told both that the ivy will not harm the tree and that it will eventually kill it. Last year I cut some of the vines. Some of the small ones died and others kept growing, so apparently they have grown into the tree and are receiving nourishment from it.
I'd like to know if this will harm the tree and, if so, what can I do to remove it without destroying the ive bed under the tree and damaging the tree itself. Is there anything I can rub on the leaves, or will this poison the tree since the roots have grown into the bark? Help please!