Before revision: The science of ampelography began seriously in the 19th century, when it suddenly became important to understand more about the different species of vine, as they had very different resistance to disease and pests such as phylloxera.
After revision: The science of ampelography began seriously in the 19th century, when it became important to understand more about the different species of vine, as they had very different resistance to disease and pests such as phylloxera.