Rootstock: Disease-resistant native American grapevine grown specifically to provide a root system on which to graft Vitis vinifera varieties. Most of the world takes these measures to prevent attacks of phylloxera.
砧木： 美国本土抗病菌的葡萄藤，专门为其嫁接的欧洲属葡萄品种的提供根系。全球大多数产区都采取这种方式预防根瘤蚜疾病。
