| American elm |
Ulmus americana |
1 |
| apple scab |
Venturia inaequalis |
1 |
| black canker |
Physalospora miyabeana |
1 |
| chestnut blight or canker |
Cryphonectria parasitica |
1 |
| fire blight |
Erwinia amylovora |
1 |
| gouty oak gall |
Callirhytis quercuspunctata |
1 |
| Guignardia blotch of buckeyes and horsechestnuts |
Guignardia aesculi |
1 |
| lace bugs |
|
1 |
| leaf blister of elm |
Taphrina ulmi |
1 |
| lichen |
|
1 |
| oak leaf blister |
Taphrina caerulescens |
3 |
| oak saucer gall |
Andricus parmula |
1 |
| powdery mildew |
Phyllactinia guttata |
1 |
| Septoria leaf spot and cankers |
Septoria spp. |
1 |
| soil compaction |
|
1 |
| sooty mold |
|
1 |