I've never seen or heard of trees killing Oak Mistletoe (Phoradendron leucarpum) We had a few Wild Black Cherry (Prunus serotina) in our backyard at our former home but I never noticed Mistletoe growing in those trees. There were a couple of huge masses of it a Sugarberry tree and a current neighbor has a huge mass of it in their big Elm tree. Mistletoe sends roots into the wood of the tree where it retrieves water and nutrients so I wonder if possibly the Mistletoe died because it wasn't for some reason getting the nutrients it needed to survive?
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!