Bug Identifier
Japanese Beetle
Community identification

Japanese Beetle

Popillia japonica

Order & Family
Coleoptera: Scarabaeidae
Size
8 to 11 mm (0.3 to 0.4 inches) in length
See this bug in the Encyclopedia

Natural Habitat

Found in gardens, landscapes, parks, and golf courses where host plants and turfgrass are present.

Diet & Feeding

Adults are generalist herbivores that skeletonize leaves of over 300 plant species; larvae (grubs) eat the roots of grasses.

Behavior Patterns

Adults are active during the day and are strong fliers attracted to pheromones and the scent of damaged plants. They undergo complete metamorphosis: egg, larva, pupa, and adult.

Risks & Benefits

Highly invasive and destructive agricultural pest. While they provide a food source for some birds and mammals, they cause significant economic damage to turf, ornamentals, and crops.