view of corn smut. ustilago maydis disease on corn plant in the field. fungal disease on a corn cob

agriculture agronomy background biological bunt closeup cob corn corncob cornfield cron crop danger dangerous disease ear eating environment environmental farm farming field food fresh fungal fungus green grow harmful health infected infection ingredient loss macro maize maydis medicine nature nourishment organic parasite plant raw smut summer ustilago vegetable view vitamin