| Insect Species | |
| Scientific Name & Common Name (if any) | Insect Family |
| Colopha ulmicola (Elm Cockscomb Gall Aphid) | Aphididae (Aphids) |
| Eriosoma americanum* (Woolly Elm Aphid) | Aphididae (Aphids) |
| Eriosoma lanigera* (Woolly Apple Aphid) | Aphididae (Aphids) |
| Kaltenbachiella ulmifusa (Slippery Elm Gall Aphid) | Aphididae (Aphids) |
| Tetraneura ulmi (syn. Colopha graminis) (Elm Sack Gall Aphid) | Aphididae (Aphids) |
| Tinocallis saltans (Siberian Elm Aphid) | Aphididae (Aphids) |
| Tinocallis ulmifolii (Elm Leaf Aphid) | Aphididae (Aphids) |
| Eratoneura ardens (syn. Erythroneura ardens) | Cicadellidae (Leafhoppers) |
| Eratoneura basilaris (syn. Erythroneura basilaris) | Cicadellidae (Leafhoppers) |
| Eratoneura bigemina (syn. Erythroneura bigemina) | Cicadellidae (Leafhoppers) |
| Eratoneura bispinosa (syn. Erythroneura bispinosa) | Cicadellidae (Leafhoppers) |
| Eratoneura campora (syn. Erythroneura campora) | Cicadellidae (Leafhoppers) |
| Eratoneura stoveri (syn. Erythroneura stoveri) | Cicadellidae (Leafhoppers) |
| Scaphoideus luteolus (Banded Elm Leafhopper) | Cicadellidae (Leafhoppers) |
| Chionaspis furfura (Scurfy Scale) | Diaspididae (Armoured Scales) |
| Diaspidiotus ancylus (syn. Aspidiotus ancylus) (Putnam Scale) | Diaspididae (Armoured Scales) |
| Gossyparia spuria (European Elm Scale) | Eriococcidae (Felt Scales) |
| Ceresa bubalus (Buffalo Treehopper) | Membracidae (Treehoppers) |
| Lopidea heidemanni | Miridae (Plant Bugs) |
| Brochymena quadripustulata (Four-Humped Stink Bug) | Pentatomidae (Stink Bugs) |
| Corythucha ulmi (Elm Lace Bug) | Tingidae (Lace Bugs) |
| Calligrapha scalaris (Elm Calligrapha) | Chrysomelidae (Leaf Beetles) |
| Monocesta coryli (Large Elm Leaf Beetle) | Chrysomelidae (Leaf Beetles) |
| Pyrrhalta luteola (Elm Leaf Beetle) | Chrysomelidae (Leaf Beetles) |
| Popillia japonica (Japanese Beetle) | Scarabaeidae (Scarab Beetles) |
| Cimbex americana (Elm Sawfly) | Cimbicidae (Cimbicid Sawflies) |
| Tetranychus schoenei** (Schoene Spider Mite) | Tetranychidae (Spider Mites) |