Podosphaera euphorbiae (Castagne) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (02-02-26). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Sphaerotheca euphorbiae (Cast.) Salmon; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Botrytis euphorbiae Cast.

Taxonomic Literature: Taxonomic notes: +conidiophores foot cells cylindric, straight, followed by 1-3

shorter cells;
+appressoria nipple shaped;
+secondary mycelium
very
pannose, a brown felt, consisting of coloured, coarse,
tortuous,
flexuous hyphae, walls thick, ca. 3-5 µm
wide;
+ascoc. outer
cell walls obscure, irregularly polygonal, 8-
20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [108-110] (1987); Braun U., The powdery mildews (Erysiphales) of Europe.- 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Australasia (needs confirmation), and Europe. Region(s): Siberia (and Central Asia).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, forming independently from the host thallus or mycelium, not emerging, .08-.105 mm in diam.. Margin: Interlaced with each other, mycelioid (narrow), .5-2 µm long, hyaline or faintly pigmented (brown), few (mostly), growing all across the lower half of the ascocarp, smooth or rough, not branched, septate.

Asci: 1 asci per ascocarp, 80-100 µm long, 50-80 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, ellipsoid or ovoid, (16)-18-28 µm long, 10-18 µm wide.

Conidiophores: Basal cells 30-85 µm long, 9-11 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, nearly cylindrical (often), or ovoid; (20)-24-34 µm long, 12.5-16.5-(18) µm wide.

(report generated 04.Okt.2007)