• a method of propagating vines that is the only sure way of producing plants resistant to phylloxera or other diseases. A phylloxera-resistant rootstock is used and a piece of a fruiting variety, which has a single bud, is inserted into a hole in the rootstock so that the inserted stem (the scion) can draw nutrients from the rootstock and grow. The join heals with time and the new fruiting stem produces grapes, while the rootstock remains resistant to disease.