观赏植物的国际贸易在近年来大有增加,并且仍在增加。这些植物大部分是无性繁殖的,许多感染有病毒,因而,把害虫和疾病传到新的地理区域并进入新作物的危险似乎正在增大。在病毒方面这种危险往往是特别大的,因为某些品种中常常是无症状的,休眠种植材料中也见不到症状。本文试图评价对观赏植物和对粮食作物的这种威胁,引证具体病毒为例以说明其中 International trade in ornamental plants has greatly increased in recent years and is still growing. Most of these plants are vegetative and many are infected with viruses, thus the risk of pests and diseases reaching new geographical areas and entering new crops appears to be on the rise. This danger is often extremely large in terms of the virus, as some species are often asymptomatic and see no symptoms in dormant plant material. This article attempts to assess the threat to ornamental plants and to food crops, citing specific viruses as an example to illustrate