SupBiotech 1 article published in JoVE Environment Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products Valentina Gligorijevic1, Coralie Benel1, Patrick Gonzalez1, Agnès Saint-Pol1 1Food Engineering Laboratory, Sup’Biotech We describe a modified agar-based method designed to quantify the antifungal effects of plant-derived products. Both volatile and non-volatile contributions to the antifungal activity can be assessed through this protocol. In addition, efficacy against fungi can be measured at key developmental stages in a single experimental setup.