I have been asked several times about the lichen that grows on trees and what it is, does it hurt the tree and how to get rid ...

Over the course of many years working with trees, hundreds of people have asked me about “that stuff” growing on the bark, or hanging from the branches of trees. What is it? Is it a disease? Is it ...

Soon after we moved to the country many years ago, I noticed that the trunks of most of the trees had odd, scattered, gray-green patches. Were the trees dying? Did I need to spray them with something?

Editor’s note: This is the second in a three-part “What’s on my tree?” series about organisms that are commonly found growing on trees in Louisiana. Read the first part at https://www.lsuagcenter.com.