Evaluation of the activity of a plant extract against Plasmopara viticola in grapes Cristina Sudiro, Gregory Saccozza, Federico Guglielmi, Marie Hochart, Damiano Giacomello and Adriano Altissimo BIO Web Conf., 44 (2022) 03003 Published online: 31 January 2022 DOI: 10.1051/bioconf/20224403003