''Sawadaea tulasnei'' is a form of

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

is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals 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 Erysiphaceae. 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 (Japanese: ''irohamomiji'', , or ''momiji'', (栴), is a species of woody plant native to Japan, Korea, China, eastern Mongolia, and southeast Russi ...

'' (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-tree-disease-stub