''Physoderma maydis'' is a species of

fungus A fungus (plural, : fungi or funguses) is any member of the group of Eukaryote, eukaryotic organisms that includes microorganisms such as yeasts and Mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified ...

in the family

Physodermataceae Physodermatacae is a family of chytrid fungi in the order Physodermatales. Species in the family have a parasitic relationship with the host's physoderma. This family is distinctive in that it contains a thick wall around the sporangia to resist ...

. It is a pathogen of the

maize Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn ( North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. ...

, causing a disease known as brown spot of maize or brown spot of corn. This species was first labeled in 1910 in India, then again a year later in Illinois.

References

Fungal plant pathogens and diseases Blastocladiomycota {{fungus-plant-disease-stub