It is not very destructive in Japan, where it is controlled by natural predators, but in America it is a serious pest of about 200 species of plants, including rose bushes, grapes, hops, canna, crape myrtles, and others. These insects damage plants by skeletonizing the foliage, that is, consuming only the leaf material between the veins. As the name suggests, the Japanese beetle is native to Japan. The insect was first found in the United States in 1916 in a nursery near Riverton, New Jersey. It is thought the beetle larvae entered the United States in a shipment of iris bulbs prior to 1912, when inspections of commodities entering the country began.
Size is approximately 10 mm long and 7 mm wide. It is generally metallic green, with bronze or coppery-brown wing covers that do not completely cover the abdomen. The five patches of white hairs on each side of the abdomen, and one pair on the last abdominal segment distinguish P. japonica from all other similar looking beetles.
Found foraging on plants, common in gardens. June to August.