Plant disease resistance improver and a method for manufacturing the same

The present invention, using the yeast-derived components that have been established in safety as a food, the robust plants by improving resistance to disease and pests, and enables Kennae development, the more high-quality and high productivity possible and are expected to, and to provide a plant disease resistance improver. The present invention provides a plant disease resistance improver containing yeast cell wall decomposition product. The invention also includes a yeast cell wall decomposition product, to provide a specific control for material used to confer resistance to plant diseases. Further, the present invention provides the use of a yeast cell wall decomposition product for improving the disease resistance of plants. Further, the present invention is characterized by the addition of yeast cell wall decomposition product in a plant activator, provides a method for improving plant disease resistance improving effect of the plant activator. Further, the present invention provides a cultivating method comprising providing the plant disease resistance improver seedlings after seedlings and / or planting.