Oidium lycopersicum Cooke & Massee emend. Noordel. & Loer.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (03-01-21). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Taxonomic notes: +appressoria nipple-shaped to lobed, opposite or spread, ca. 3-9 µm wide;
+conidiophores foot-cells more or less cylindric, followed by 1-2 shorter cells, sometimes by a single cell of about the same length, foot-cells occasionally somewhat inflated in the middle and constricted at the base and at the following septum;
+conidia germ tubes arising from an end or side of the conidium, ca. 40-60 x 4-6 µm, substraight, curved, flexuous or even helically twisted, apex simple, not enlarged, sometimes conspicuously broadened, germ tubes increasing in width from base to top;. Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Cosmopolitan (probably nearly, but exact distribution unknown). Continent: Africa, Antarctica, Asia-Temperate, Australasia, Europe, Northern America, Southern America, and Asia-Tropical. Country or state(s): United Kingdom, Benelux (Belgium & Luxembourg), Germany, Netherlands, Poland, and France (excl. Corsica).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Solanaceae.

Conidiomata: Present; hyphomycetous.

Conidiophores: Basal cells (25)-35-50-(75) µm long, 6-12 µm wide. Conidium Formation: Conidiogenous cells single or in chains (rarely in short pseudochains). Conidia: Ellipsoid, ovoid, or doliiform; (20)-28-45-(50) µm long, (13)-15-20-(28) µm wide; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)