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美国是农产品生产大国，也是世界农产品出口主要国家之一，植物检疫问题对农业生产安全和农产品出口影响巨大。如小麦印度腥黑穗病 1996年 3月在美国亚利桑那州首次发现后，世界上立即有 20个以上国家宣布限制或禁止从美国进口小麦。因此，为确保农业生产安全和出口贸易的顺利
The United States is a big producer of agricultural products and one of the major countries in the world in export of agricultural products. The issue of plant quarantine has a huge impact on agricultural production safety and the export of agricultural products. For example, after the wheat Indian smut was first discovered in Arizona in March 1996, more than 20 countries in the world announced the immediate restriction or prohibition of the import of wheat from the United States. Therefore, to ensure the safety of agricultural production and the smooth export trade