Hi Jerry,

If your tree had Dutch elm disease you'd see large areas of dead leaves in the canopy. These look like seasonal insect damage.

The first two photos appear to be leaf galls, which are created by tiny insects that nest in the bumps. This is a cosmetic issue and does not threaten the health of the tree.

See more here:

https://extension.umn.edu/yard-and-garden-insects/insect-and-mite-galls

The third photo looks like elm leafminer damage. Again the damage is irritating but rarely affects the tree's health.

https://www.canr.msu.edu/news/common_spring_leafminers

Using chemicals for these issues is not usually recommended because the damage is to tree appearance, not health.

Good luck.



You’re welcome!