What Disease Is Infecting My Maple Trees??

Question

see photos

• 
• 
• 
• 
• 

Answer 1

There are holes in the trees, which could be from borers. Here is more:

https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-borer-insects.htm

I also see lichen on a tree, which are harmless and no treatment is needed.

https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm