Elm Leaf Beetle

Natural Habitat

Found primarily on or near elm trees; they often enter buildings and homes during late summer or fall seeking shelter for overwintering.

Diet & Feeding

Adults and larvae feed exclusively on the foliage of elm trees (Ulmus spp.), causing skeletonization of leaves.

Behavior Patterns

They undergo a complete metamorphosis. Adults emerge in spring to lay eggs on leaves; in winter, they hibernate in dry, protected areas like attics or under bark. They are attracted to light.

Risks & Benefits

They are a significant pest to elm trees, potentially defoliating and weakening them. They are a nuisance in homes but do not bite humans, spread disease, or damage household structures.

Identified on: 3/22/2026