Rootstock
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A rootstock is part of a plant, often an underground part, from which new above-ground growth can be produced. It could also be described as a stem with a well developed root system, to which a bud fr
Grafting, 1870, by Winslow Homer—an example of grafting
Phylloxera
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Grape phylloxera is an insect pest of grapevines worldwide, originally native to eastern North America. Grape phylloxera belongs to the family Phylloxeridae, within the order Hemiptera, bugs; original
Rootstock
…such as resistance to drought, root pests, and diseases. Grapevines for commercial planting are most often grafted onto rootstocks to avoid damage by phylloxera, though vines available for sale to back garden viticulturists may not be. The rootstock may be a different species from the scion, but as a rule it…
Dactylosphaera vitifolii MKL Bd. 13 1890
Galls made by D. vitifoliae on leaf of Vitis sp.
Phylloxera nymphs feeding on the roots
François Baco, creator of Baco blanc, was one of many grape breeders to introduce hybrid wine grape varieties in response to the phylloxera epidemic.