Therefore, the true origin of any piece of wood packing material is difficult to determine and thus its phytosanitary status cannot be ascertained. 因此，所有木質包裝材料的真實原產地難以確定，從而使其植物檢疫狀況也不能確定。
Our country's port inspection and quarantine services intercepted pinewood nematode in wood packing materials from the U. S. and Japan for many times. 我國的口岸檢驗檢疫機關從來自美國和日本的木質包裝中多次截獲到松材線蟲。
