Search on : Taxa descriptions

 


   
Literature:
 
Page number:131 
Description type:Non-original description 
Description:Pseudocercospora vitis (Lév.) Spegazzini, An. Mus. nac. Hist. nat. B. Aires 20: 438 (1910). (Figs. 79, 80.)
Septonema vitis Léveillé, Annls Sci. nat., Bot., ser. 3, 9: 261 (1848).
Cladosporium vitis (Lév.) Saccardo, Myc. venet. n. 284 (1875).
Cercospora vitis (Lév.) Saccardo, Nuovo G. bot. ital. 8: 188 (1876).
Helminthosporium vitis (Lév.) Pirotta [as '(Sacc.)'], Revue mycol. 11: 185 (1889).
Phaeoisariopsis vitis (Lév.) Sawada, Rep. Dep. Agric. Govt Res. Inst. Formosa 2 (Descr. Cat. Formosan Fungi II): 164 (1922).
Cercosporiopsis vitis (Lév.) Miura, Flora of Manchuria and East Mongolia III Cryptogams, Fungi (Industr. Contr. S. Manch. Rly 27): 527 (1928).
Cladosporium viticolum Cesati, Flora 38: 206 (1854).
Cercospora viticola (Ces.) Saccardo, Syll. Fung. 4: 458 (1886).
Cladosporium ampelinum Passerini, Erb. critt. ital., ser. 2, n. 595 (1872).
Graphium clavisporum Berkeley & Cooke, Grevillea 3: 100 (1874).
Isariopsis clavispora (Berk. & Cke) Saccardo, Syll. Fung. 4: 631 (1886).
= Cercospora vitis (Lév.) Sacc. var. rupestris Ciferri, Annls mycol. 20: 45 (1922).
Perfect state: Mycosphaerella personate Higgins, Am. J. Bot. 16: 287 (1929).
Leaf spot suborbicular, very variable: sometimes only 1-2 mm wide or up to 5 mm wide, greyish brown in the centre with a purplish margin; sometimes up to 15 mm wide, reddish brown, not paler in the centre and with no red margin but with an irregular margin, surrounded by a narrow yellowish zone. Caespituli amphigenous, chiefly hypophyllous but some-times also plentiful on the upper surface, consisting of discrete olivaceous coremioid conidiophore fascicles loosely distributed over the spot. Mycelium internal: hyphae colourless or very pale olivaceous, 1 52 µm wide. Stroma pseudoparenchymatous, up to 35a wide and 15 µm high, composed of closely packed olivaceous hyphae. Conidiophores up to 50 or more in an erect loose coremioid fascicle which is expanded towards the apex, not adherent to each other, simple, substraight or slightly sinuous, varying from pale to moderately deep olivaceous, septate, smooth, up to 500 µm (frequently 200-250 µm) long, the epiphyllous ones usually shorter and often only about 50 µm long, (2) 3-5.5 (7) µm wide. Proliferation usually sympodial, the old conidial scars (about 1.5 µm diam.) often situated at the end of conspicuous conoid denticles which are often crowded in small groups, but sometimes situated on flat shoulders (the conidiophores then being some-what geniculate), more rarely on very short and much less conspicuous denticles (the conidiophore then being more or less sinuous): sometimes percurrent, more especially in young conidiophores, leaving what are probably pseudo-annellations on the conidiogenous cells. Conidia varying from pale to rather deep olivaceous, thin walled when pale but somewhat stouter walled when darker, mostly obclavate and often rostrate (the rostrum sometimes paler in colour), sometimes fusiform, substraight or slightly curved, smooth or often wrinkled-rough, 3-17 transversely septate, sometimes with one or two additional longitudinal or oblique septa, usually not constricted but sometimes slightly constricted at a few of the septa, 24-99 x 4-8 µm, rarely up to 9 µm wide.
On Vitis vinifera Linn. and some other species of Vitis (Vitaceae) in Europe, Asia, Africa, Australia, north and south America and the West Indies.
 
Taxon name: