• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Blumeria graminis (DC.) Speer

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Scientific name
Blumeria graminis
(DC.) Speer
Common names
IUCN Specialist Group
Cup-fungi, Truffles and Allies
Assessment status
Proposed by
Oliver Ellingham
Comments etc.
Oliver Ellingham

Assessment Notes

Taxonomic notes

Formerly Erysiphe graminis. Since renamed Blumeria graminis.
Split below species level into 8 distinct ‘formae speceales’.

Why suggested for a Global Red List Assessment?

This species is common globally. It should be assessed and added to the database as a species of least concern.

Geographic range

Population and Trends

Population Trend: Improving

Habitat and Ecology

Grows readily on both wild and cultivated grasses; a particular problem on important agricultural grasses (wheat, barley, rye etc.).

Blumeria graminis disperses by scattering conidia and ascospores. It is biotrophic, and does not grow on synthetic media. Relatively cool and humid conditions are favourable for its growth. Its relatively great genetic variability enables it often to infect previously resistant plant varieties.

Temperate Grassland


Threats come from human intervention: use of fungicides and fertilisers in order to prevent host infection and development of resistant plant species.

Agro-industry farmingNomadic grazingAgro-industry grazing, ranching or farming

Conservation Actions

Numerous cultures of this species are regularly maintained in labs across the globe.

Benign introductionEx-situ conservationGenome resource bankMarket forces

Research needed

Effects of newly integrated technologies for protection of economically important agricultural and horticultural host plants of phytopathogens.

Population trends

Use and Trade


Bebber, Daniel P., Mark AT Ramotowski, and Sarah J. Gurr. “Crop pests and pathogens move polewards in a warming world.” Nature climate change 3.11 (2013): 985-988.
Braun, Uwe. “Taxonomic manual of Erysiphales (powdery mildews).” CBS Biodiversity series 11 (2012).
Ellingham, Oliver, John David, and Alastair Culham. “Powdery Mildew Identification.”

Country occurrence

Regional Population and Trends

Country Trend Redlisted