The invention relates to a method for controlling diseases in plants, in which a composition is applied to the plants, said composition comprising a compound having a structure represented by one of formulas (I) to (V): The invention also relates to the use of said compounds, or the salts thereof, in order to stimulate the natural defense and induce resistance to diseases in plants. The invention further relates to the use of said compounds having a structure represented by one of formulas I to V for the preventive and curative treatment of the aforementioned diseases. In addition, the invention relates to a composition for use in agriculture, comprising a compound having a structure represented by one of formulas I to V.
