植物检疫 2.Concept of Plant Quarantine 助决策 Regulatory actions are often employed to prevent immigration of foreign pests or to prevent the dispersal of established pests.Such actions are termed legal methods of pest management. Plant Quarantine is used to protect and defend plants from pests. 2. Concept of Plant Quarantine Regulatory actions are often employed to prevent immigration of foreign pests or to prevent the dispersal of established pests. Such actions are termed legal methods of pest management. Plant Quarantine is used to protect and defend plants from pests