The French scientist and professor of viticulture Gustave Louis Emile Foëx (1844-1906) was the first director of the viticulture institute "École Nationale Supérieur Agronomique" in Montpellier (Languedoc). Among other things, he dealt with the fight against the mildew and the phylloxera and in this context created the document "333 EM". He already argued in 1868 that the phylloxera could not have come from Europe, because then it would have long since wiped out the vines and winegrowing on the continent. Rather, it must have come from a country where it lives as a parasite on plants, but which has adapted to the pest.
This assumption was then confirmed by the French botanist Jules Émile Planchon (1823-1888) on a study trip to North America in 1873. He met there with the entomologist Charles Valentine Riley (1843-1895) who demonstrated that the French insect was identical to the American one. Together with Pierre Viala (1859-1936) Foëx was the author of the works "Le Mildiou ou Peronospora de la vigne" (downy mildew) and "Ampélographie américaine" (American vines). The picture shows a monument on the university campus in Montpellier in honor of the scientist. See also under Viticulture personalities,