Fuente: WIPO "tomato" The invention relates to a composition comprising at least one polypeptide and at least one cell wall disrupting agent. The invention further relates to a composition comprising at least one polypeptide and at least one cell wall disrupting agent, for example wherein the at least one polypeptide is an antibody or fragment thereof such as a heavy chain variable domain of a heavy chain antibody (VHH) or a functional fragment thereof. The antibody or fragment thereof may be capable of binding to a fungus. The invention further relates to methods and use of the compositions disclosed herein. The invention relates to methods for protecting or treating a plant or a part of said plant from an infection with a plant pathogenic fungus, a post-harvest treatment method for protecting or treating a harvested plant or a harvested part of said plant from an infection with a plant pathogenic fungus and a method of inhibiting the growth of, or killing, a plant pathogenic fungus, comprising at least the step of applying to a plant or to a part of said plant the composition disclosed herein.