Tar Spot
Tar spot may refer to: *'' Phyllachora maydis'', a fungus species that cause tar spot disease of maize *'' Rhytisma acerinum'', a fungus species that causes tar spot disease of maples {{Short pages monitor ...
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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. there is insufficient information about this pathogen and its management. Symptoms and signs This pathogen is an obligate parasite solely of the species ''Zea mays''. The first symptoms are yellowing spots on both upper and lower leaf surfaces. Within the spot develops the characteristic black stromata over the ascomata, along with chlorosis of surrounding tissue. The chlorotic rings may be elliptical, circular, or may conjoin to form striping up to long. Some of the chlorotic tissue around the ascomata may become necrotic ...
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