Synonyms: Acrosporium monilioides, Erysiphe communis, Erysiphe graminis, Oidium bulbigerum, Oidium monilinoides, Oidium monilioides, Tigria graminis.
Common name: barley powdery mildew.
Extract from Wikipedia article: Blumeria graminis (commonly called barley powdery mildew or corn mildew) is a fungus that causes powdery mildew on grasses, including cereals. It is the only species in the genus Blumeria. It has also been called Erysiphe graminis and (by its anamorph) Oidium monilioides or Oidium tritici.
Catalan: Oïdi del blat, Chinese: 禾本科布氏白粉菌, Dutch: Grasmeeldauw, Egyptian Arabic: بلوميريا جرامينيس, Persian: سفیدک سطحی گندمیان, Serbian: Пепелница жита, Slovenian: Žitna pepelovka, Swedish: Gräsmjöldagg, Welsh: Llwydni blodiog gweiriau.
Blumeria graminis is a powdery mildew fungus that infects grasses, particularly wheat, barley, and oats. In East and Central Texas, it has been found to cause significant disease outbreaks on these crops, with high humidity and warm temperatures facilitating its growth. The fungus produces white, powdery spores on the surfaces of infected leaves, leading to reduced photosynthesis and yield losses. It is an obligate parasite, requiring a living host to complete its life cycle, and is commonly managed through fungicides, resistant cultivars, and cultural practices.
Spores of powdery mildew (lawn and garden fungus) Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) at low magnification, in lugol, collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) in Melzer, collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores (conidia?) of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Chain of conidia of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores and conidia of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Grass with powdery mildew fungus Blumeria graminis (Erysiphe graminis) on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores and conidia of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores, conidia and chasmothecia(?) of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Various types of spores of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Spores and chasmothecia(?) of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023
Conidia and chasmothecia(?) of corn powdery mildew fungus Blumeria graminis (Erysiphe graminis) collected from grass on a lawn of apartments on George Bush Drive. College Station, Texas, March 13, 2023Observations of the fungus Blumeria graminis in East and Central Texas revealed its presence on lawns in College Station. Spores were collected from grass on an apartment lawn on George Bush Drive and examined under various conditions, including low magnification, lugol, and Melzer. The observations showed chains of conidia, as well as spores and conidia in various stages. Some samples also appeared to contain chasmothecia, a type of fruiting body. The fungus was found to be widespread on the lawn, with infected grass displaying symptoms of powdery mildew. Multiple types of spores were observed, suggesting a diverse range of reproductive structures. Overall, the observations provided detailed insights into the morphology and distribution of Blumeria graminis in this region.
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