''Rhynchosporium'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

fungi 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 ...

that causes leaf scald disease on several graminaceous hosts. It includes five currently accepted species: '' R. secalis'' from

rye Rye (''Secale cereale'') is a grass grown extensively as a grain, a cover crop and a forage crop. It is grown principally in an area from Eastern and Northern Europe into Russia. It is much more tolerant of cold weather and poor soil than o ...

and

triticale Triticale (; × ''Triticosecale'') is a hybrid of wheat (''Triticum'') and rye (''Secale'') first bred in laboratories during the late 19th century in Scotland and Germany. Commercially available triticale is almost always a second-generation ...

, '' R. orthosporum'' from ''

Dactylis glomerata ''Dactylis glomerata'' is a species of flowering plant in the grass family Poaceae, known as cock's-foot,Interactive Flora of NW Europ''Dactylis glomerata'' (Cock's-foot)/ref> also colloquially as orchard grass, or cat grass (due to its populari ...

'', '' R. lolii'' from ''

Lolium multiflorum ''Lolium multiflorum'' (Italian rye-grass, annual ryegrass) is a ryegrass native to temperate Europe, though its precise native range is unknown. It is a herbaceous annual, biennial, or perennial grass that is grown for silage, and as a cover ...

'' and '' L. perenne'', '' R. agropyri'' from '' Agropyron'', and '' R. commune'' from ''

Hordeum ''Hordeum'' is a genus of annual and perennial plants in the grass family. The species are native throughout the temperate regions of Africa, Eurasia, and the Americas. Taxonomy Species Species include: * '' Hordeum aegiceras'' – Mongo ...

'' spp., ''

'' and '' Bromus diandrus''. ''R. commune'' is one of the most destructive pathogens of barley worldwide, causing yield decreases of up to 40% and reduced grain quality.
Plant Pathology

References

Fungal plant pathogens and diseases Enigmatic Ascomycota taxa {{fungus-plant-disease-stub