corn field in summer with disease corn cob in foreground. huitlacoche - corn smut, fungus, mexican truffle close- up

agriculture bad biology breakdown cob corn corncob crop damage delicacy disease ear eat farming field filling foreground fungal fungus galls gmo green huitlacoche leaf maize maydis medicine mexican mushroom nature organic outdoor pathogenic seed smut stem toxic truffle tumorlike tumour ustilago vegetable