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Invasive Species: Japanese Beetle

Invasive Species: Japanese Beetle

Japanese Beetle

(Popilla japonica)
*Established in Michigan*

Report this species:

The Japanese beetle is widespread throughout the state. Reports of its range are no longer being mapped.

Identification:

  • Adult beetles are about 3/8 inch in length, with a bright metallic green head and body and metallic brown wings.
  • Legs are darker green.
  • Twelve tufts of white hairs surround the edges of the abdomen.
  • Grubs or larvae are about 1/16 to ¼ inch in length, white, with three pairs of legs.
  • Adult beetles emerge in June or July and feed throughout the summer.

Japanese Beetle

Photo courtesy of David Cappaert, Michigan State University, Bugwood.org.

Japanese Beetle

Photo courtesy of David Cappaert, Michigan State University, Bugwood.org.

Habitat:  Grubs live underground, feeding on grass roots, leaving brown patches in lawns.  Adults feed on the foliage, flowers and fruit of hundreds of plants including tree fruits, small fruits, ornamentals, garden vegetables, soybeans and corn.

Native Range:  Japan and Eastern Russia.

U.S. Distribution:  The Japanese beetle is established in nearly all Eastern states, with populations detected in some states west of the Mississippi.

Local Concern:  Japanese beetle grubs damage lawns and turf grasses.  Beetles skeletonize leaves and flowers of ornamental plants and trees and can damage crops.

MORE INFORMATION:

Japanese Beetle Invasive Species Alert - Printable PDF