Q.Sycamore Trees
I live in Philadelphia and have walked through many of our parks where American Sycamore trees abound. While there are many places that have become overgrown with vines and massive trees that have been killed by vines, I have never seen a sycamore tree with this ailment. Is there a reason for this? Are sycamore trees somehow resistant to or less savory to vines?
I was also wondering about the reason that sycamore tree bark gets so white on the top even though the base remains speckled.
Sycamore Trees shed bark; the rate of this may appear darker or lighter on the trunk, depending on the age of the tree.
I don't know what vines you are referencing, but I would suggest you talking with your local County Extension Office. They can tell you the type of vine you mention as well as how to remove from your trees.
https://www.gardeningknowhow.com/ornamental/trees/sycamore/sycamore-tree-care.htm
https://www.gardeningknowhow.com/extension-search/