Grape Phylloxera is a pest, which can cause damage to grapevines. This pest has become a major threat to the wine industry because it can kill grapevines, which results in reduced grape yields. There are a number of synonyms for the word "Grape Phylloxera", which include Vine Louse, Phylloxera Vastatrix, Grapevine Louse and American Grapevine Root Aphid. Each of these names refers to the same species of insect, which feeds on the roots and leaves of grapevines and can cause significant damage if left untreated. Prevention measures, such as using resistant rootstocks, are essential to protect grapevines from this pest.