Bug Identifier
Western Striped Cucumber Beetle
Community identification

Western Striped Cucumber Beetle

Acalymma trivittatum

Order & Family
Coleoptera: Chrysomelidae
Size
5 to 6 mm (about 0.2 inches) in length
See this bug in the Encyclopedia

Natural Habitat

Agricultural fields, vegetable gardens, meadows, and areas where cucurbits (squash, melons, cucumbers) grow

Diet & Feeding

Herbivorous; adults feed on the leaves, stems, blossoms, and fruits of cucurbits (cucumbers, melons, squashes, pumpkins), while larvae feed on plant roots.

Behavior Patterns

Adults overwinter in plant debris or soil and emerge in spring to feed and lay eggs near the base of host plants. They are active fliers and can cause severe defoliation during peak populations.

Risks & Benefits

Risks: Significant agricultural and garden pest that defoliates crops and vectors bacterial wilt (Erwinia tracheiphila) and squash mosaic virus. Benefits: Serves as a food source for natural predators like lady beetles, lacewings, and parasitoid flies.