Elm Leaf Beetle

Natural Habitat

Found on and around Elm trees; often enters homes in autumn to seek shelter for overwintering.

Diet & Feeding

Both larvae and adults feed exclusively on the leaves of various elm species (Ulmus spp.).

Behavior Patterns

Adults hibernate in protected dry areas like crevices or attics. They emerge in spring to lay yellow eggs on the underside of leaves. Larvae skeletonize leaves, leaving only veins.

Risks & Benefits

They are a nuisance pest in homes but do not bite or carry disease. In ecosystems, heavy infestations can defoliate and weaken elm trees, making them susceptible to other diseases like Dutch Elm Disease.

Identified on: 3/1/2026