Common name: Japanese beetle
Scientific name: Popillia japonica
Hosts: The adult beetles feed on over 300 species of ornamental plants with roses, lindens, and grapes being among their preferred hosts. The immature form of the beetle, a grub, feeds on the roots of lawns.
The Japanese beetle is native to Japan and was accidentally introduced into the United States in 1916. Since that time it has slowly spread westward to infest most of the Eastern half of North America. Both the adult and larval stages of the Japanese beetle can be quite destructive.
Japanese beetle adults are 1/2 inch-long, shiny, metallic green, oval insects. They have coppery-brown wing covers and five tufts of white hairs along each side of their bodies. The larvae of Japanese beetles are white grubs with three pairs of jointed legs and a yellow-brown head. They are found in the soil. They take on the C-shape that is typical of other grubs.