at the International Asparagus Days 2019 in Angers, among presentations on the different ways of producing white, green or violet asparagus (conventional, organic, biodynamic, Zero pesticide residues and High Environmental Value), the latter was presented by Régis Knight of Maraichers Nantais, following these presentations were at the round table Philippe Larrere Larrere Farms manager, Frédéric Poupard Angevine, Gilles Botrel Direct Production and Stéphane Hoffman of Fruidor