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. "The first Japanese beetle found in Canada was in a
tourist's car at Yarmouth, arriving in Nova Scotia
by ferry from Maine in 1939. During the same year, three additional
adults were captured at Yarmouth and three at Lacolle in southern Quebec." The
life cycle of the Japanese beetle is typically one year in most parts
of the United States, but this can be extended in cooler climates; for
instance, in its native Japan, the beetle's life cycle is two years long
as a result of the higher latitudes of the grasslands required for the larval stage. During the larval stage, the white grubs can be identified by their V-shaped raster pattern.
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