A quarantine is established under this chapter against all live life stages of the insect pest Japanese beetle (Popillia japonica Newman), a member of the family Scarabaeidae. The Japanese beetle is a persistent, serious, and highly destructive pest, attacking the roots, leaves, and fruits of over 300 kinds of plants including fruit trees, ornamentals, and field and vegetable crops. The director of agriculture has determined that the regulation and exclusion of Japanese beetle is necessary to protect the environmental quality, forests, horticulture, floriculture, and agricultural crops of the state of Washington.