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 created in 1883 in this context the document "333 EM". He argued already in 1868 that the phylloxera could not come from Europe, because then they would have wiped out the grapevines or the viticulture of the continent long ago. Rather, she must have come from a country where she lives as a parasite on plants, but which would have adapted to the pest.
This assumption was confirmed by the French botanist Jules Émile Planchon (1823-1888) during a study trip to North America in 1873. This met there with the entomologist Charles Valentine Riley (1843-1895), who proved that the French insect was identical to the American one. Together with Pierre Viala (1859-1936) was Foëx author of the works "Le Mildiou or Peronospora de la vigne" (Mildew) and "Ampélographie américaine" (American vines). The picture shows a monument on the campus of the University of Montpellier in honor of the scientist. See also below Viticulture personalities,