Japanese Beetle - Life Cycle

Life Cycle

• A typical cluster of Japanese beetle eggs

• Japanese beetle larva(grub worm)

• Japanese beetle pupa

• Japanese beetle adult

• Mating, Ottawa, Ontario, Canada

• Feeding, Ottawa, Ontario, Canada

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.