''Sawadaea tulasnei'' is a form of

powdery mildew Powdery mildew is a fungus, fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of Ascomycota, ascomycete fungi in the order Erysiphales. Powdery mildew is one of the easier plant disea ...

is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

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

in the family

Erysiphaceae Erysiphales are an order of ascomycete fungi. The order contains one family, Erysiphaceae. Many of them cause plant diseases called powdery mildew. Systematics The order contains one family (Erysiphaceae), 28 genera and around 1000 species. Ma ...

. This fungus attacks the leaves of the ''

Acer platanoides ''Acer platanoides'', commonly known as the Norway maple, is a species of maple native to eastern and central Europe and western Asia, from Spain east to Russia, north to southern Scandinavia and southeast to northern Iran. It was introduced to ...

'' (Norway maple) in North America, and in Great Britain and/or Ireland, ''

Acer palmatum ''Acer palmatum'', commonly known as Japanese maple, palmate maple, or smooth Japanese maple (Korean: ''danpungnamu'' []; Japanese: ''irohamomiji'' [] or ''momiji'' []), is a species of woody plant native to Korea, Japan, China, eastern Mongol ...

'' (also known as the Japanese Maple or Smooth Japanese Maple).

Synonyms

* ''Erysiphe varium'' Fr. 1822 * ''Uncinula aceris var. tulasnei'' (Fuckel) E. S. Salmon 1900 * ''Uncinula bicornis var. tulasnei'' (Fuckel) W. B. Cooke 1952 * ''Uncinula tulasnei'' Fuckel 1866

References

Erysiphales Fungal tree pathogens and diseases Fungi described in 1937 Fungus species {{fungus-tree-disease-stub