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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-01). Data set reviewer(s): Schubert K. (06-07-25); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Acrosporium piperis (Uppal, Kamat & Patel) Subram.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Oidium piperis Uppal, Kamat & Patel. Type: Oidium piperis Uppal, Kamat & Patel.

Taxonomic Literature: Taxonomic notes: +hyphae branched, septate, hyaline, 5-8.2 µm wide, effuse; +haustoria globose;. Braun U., Beih. Nova Hedwigia 89: 1-700 [613] (1987).

Biogeography: Continent: Asia-Temperate and Asia-Tropical. Country or state(s): Taiwan; India, Sri Lanka, and Burma (= Myanmar).

Ecology: Biotroph; phytopathogenic. Host or Phorophyte Taxonomy: Piper betle L.; Piper, Piperaceae.

Conidiophores: Euoidium-type; not branched (erect, simple, 2-3-septate, 66-132 µm long). Conidium Formation: Conidiogenous cells long in chains (3-10 conidia). Conidia: Ellipsoid or doliiform; macroconidial, not branched, (20.4)-34-47.5-(74.7) µm long, (6.8)-13.6-20.4-(23.8) µm wide; aseptate.

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