Ustilaginales Mycosarcoma maydis huitlacoche Corn smut is a plant disease caused by the pathogenic fungus *Ustilago maydis* that causes smut on maize and teosinte. The fungus forms galls on all above-ground parts of corn species, and is known in Mexico as the delicacy huitlacoche; which is eaten, usually as a filling, in quesadillas and other tortilla-based foods, and soups. [https://en.wikipedia.org/wiki/Corn_smut] corn smut Ustilago maydis (DC.) Corda corn smut ustilago maydis requires discussion