Phyllachora maydis

Phyllachora maydis is a plant pathogen causing ascomycete diseases in maize/corn, and is more commonly referred to as tar spot. Identified by the distinctive development of stroma, this pathogen in itself is of little economic importance in the production of corn. However, the accompanying fungal infection of Monographella maydis, identified by “fish-eye” lesions, was claimed to cause significant foliar damage and subsequently yield reduction. As of 2021 there is insufficient information about this pathogen and its management.