Popillia japonica

Definition

A species of scarab beetle (family Scarabaeidae) native to Japan, widely known as the Japanese beetle. Adults are metallic green and copper, with distinctive white tufts of hair along the sides of the abdomen; larvae are C-shaped white grubs that feed on roots. In its native range, natural predators and parasitoids suppress populations, but it is a destructive invasive pest in North America and parts of Europe, where it feeds on foliage, flowers, and fruit of more than 300 plant species.

Etymology

From Latin Popillia (genus name, of uncertain derivation) + japonica (of Japan), referring to its native range.

Example

In eastern North America, Popillia japonica aggregations can skeletonize rose leaves within hours, with pheromone traps often used to monitor adult flight periods for integrated pest management programs.

Synonyms

• Japanese beetle

Related Terms

• Scarabaeidae
• Invasive species
• Integrated Pest Management
• Grub
• pheromone trap
• Popillia

Usage Notes

The common name "Japanese beetle" is widely used in applied entomology and agriculture; the scientific name is preferred in regulatory and quarantine contexts. Not to be confused with other Popillia species or with the Asian lady beetle (Harmonia axyridis). The species epithet is sometimes misspelled 'japonica' in older literature as 'japonicus' due to gender agreement errors, though Popillia is feminine.