Around these parts,poison ivy is only a foot or so high,doesn't grow up trees.
You sure you've identified it correctly?
Maybe that could be why you keep getting it, mis identified it with something else?
Best of luck
There are at least 3 types of poison ivy. It can grow on the ground like you see it, it can grow as a bush when out in the open and it can grow up trees as a vine on the edges of tree lines. It's easy to see as it has a fuzzy looking vine and the leaves are in 3 leaf clusters. Poison oak looks almost identical as ivy. Poison sumac looks totally different. Either was it's a fact that 3 things of this world are surely going to be in hell, poison ivy, poison oak and mosquitos.