3)Quarantine and inspection Import and export station Fields in original areas Planting separately 4)Survey pest areas Pest Area (PA):area infected with quarantine pest. Pest Free Area (PFA):area NOT infected with quarantine pest. 3) Quarantine and inspection Import and export station Fields in original areas Planting separately 4) Survey pest areas Pest Area (PA): area infected with quarantine pest. Pest Free Area (PFA): area NOT infected with quarantine pest