Japanese Beetle (Popillia japonica) is a destructive pest, causing plant damage and increased control costs within the nursery industry. Grubs feed on grass roots and damage lawns, golf courses and pastures. Adults feed on the foliage, flowers or fruits of more than 300 different ornamental and agricultural plants. The beetles were first detected in New Jersey in 1916. Interstate commerce has played a major role in the movement of this pest from the Northeast into the South and Midwest.