Large, green grey round marks on base and spreading up the tree to branches. Looks like mold of some kind. What do I treat with?
Disease on Fruit Tree
Certified GKH Gardening Expert
This is most likely lichen, and a symptom that the tree may be ill, as lichen usually like to attach to trees that are unhealthy. This article will explain more about lichen: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm