Use precaution when applying the copper sprays. Spray on days when the wind is blowing away from sensitive areas. It will wash off when exposed to frequent rain. Mechanical removal has been used successfully. However, new plants are quickly as new seed land on the limbs.
Safety is also a concern, moss is present on many of the small limbs and branches of a tree.
This creates an unsafe condition when trying to remove the moss. They are capable of producing their own food. The algae associated with the fungus is a green or blue-green alga. There are three forms of lichens based on growth patterns. Crustose are species that are closely pressed against the surface of the limb or trunk of dead or live trees.