Pest Guides

Japanese Beetle

Popillia japonica

Appearance

Image of Japanese Beetle (Popillia japonica) | Ehrlich Pest Control
  • Adult Japanese beetles are 7/16-inch long
  • Metallic green beetles with copper-brown wing covers

Lifecycle

• Adults emerge from the ground and begin feeding on plants in June. Activity is most intense over a 4 to 6 week period beginning in late June, after which the beetles gradually die off. Individual beetles live about 30 to 45 days.

Habits

  • Japanese beetles feed on about 300 species of plants, devouring leaves, flowers, and overripe or wounded fruit.
  • They usually feed in groups, starting at the top of a plant and working downward.

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