Has antifungal activity. Inhibits spore germination in F.graminearum (IC(50)=15 ug/ml), F.oxysporum (IC(50)=102 ug/ml), F.verticillioides (IC(50)=8.5 ug/ml) and D.maydis (IC(50)=12.5 ug/ml), but not in C.graminicola, B.cinerea and H.sativum at concentrations below 30 ug/ml. Inhibits hyphal development in P.infestans (IC(50)=25.5 ug/ml), but not release of zoospores. At concentrations above 100 ug/ml, induces morphological changes such as lysis of hyphae and sporangia in P.infestans. Belongs to the DEFL family.