A novel protein was isolated from Fusarium culmorum and characterized. The protein, termed FCWP1, demonstrated significant antifungal activity against several fungal species. Mutations in proteolytic consensus sequences contained within FCWP1 improved the stability of its antifungal activity. In addition, a class of proteins related to FCWP1 was identified and characterized. This class is made up of ribosomal proteins and displayed similar values for pI and molecular weight. A representative number of proteins from this class were tested and found to have significant antifungal activities.The antifungal proteins disclosed herein are useful in controlling fungal infections in plants. Transgenic plants may be produced that are more resistant to fungal infections relative to non-transgenic plants of the same species. Alternatively, the proteins may be applied to plants exogenously.