Please tell me what the disease is on this Cleveland Select Flowering Pear. Also how to prevent it and get rid of it.

Pic of whole tree, and how wide spread is the damege.
Do leaves get wet.

With that pattern of damage it may not be a disease but an environmental problem. Can you give us some history, such as whether it has been fertilized and with what, have any herbicides been used nearby, has it been short of water at any time etc. That will help with the process of elimination.

sooby said:

With that pattern of damage it may not be a disease but an environmental problem. Can you give us some history, such as whether it has been fertilized and with what, have any herbicides been used nearby, has it been short of water at any time etc. That will help with the process of elimination.

Mizzles77 said:

It is not very old and does not get over or under watered. It is watered at the base not the whole tree. No fertilizer has been used yet. Also no lawn chemicals sprayed close

So it's newly planted, how much water is it getting? How close have lawn chemicals been applied? Is the root flare (where it gets wider at the base) above the level of the soil surface but covered by the mulch?