Search on : Taxa descriptions

 


 
 Add this item to the list  Cercospora rubi Saccardo
   
Literature:
 
Page number:487 
Remarks (internal):Passerini (Atti Accad. Lincei (4) 3: 4. 1887) suggested for the perfect stage of this fungus, Gnomoniella cercosporae. Wolf (Mycologia 27: 347. 1935; 28: 85. 1936) named the ascus stage, Mycosphaerella confusa. An occasional collection may show medium dark olivaceous brown conidiophores, plainly septate and as large as 5 x 55 µm. See also C. rubicola and C. heteromalla for differences among the species on this host genus 
Description type:Non-original description 
Description:Cercospora rubi Saccardo
Nuov. Giorn. Bot. Ital. 8: 188. 1876
Cercospora septorioides Ellis & Ev., Field Columb. Mus. Bot. ser. 1: 94. 1896
Cercospora garbiniana Massalongo, Atti Mem. Acad. Agr. Sci. Lett. Verona ser. 4. 3: 147. 1902
Leaf spots mostly numerous, inclined to coalesce, circular to angular, 3-15 mm. in diameter, uniformly dull brown on lower leaf surface, reddish brown to grayish or almost gray on upper surface, frequently with? brown or purple border, rarely with a yellow halo; fruiting chiefly epiphyllous; stromata globular, dark brown, 20-40 µm or occasionally 60 µm in diameter; fascicles dense; conidiophores pale olivaceous or fuligenous, uniform in color, rather irregular in width, curved, bent or sinuous, rarely septate or geniculate, sometimes branched, minute spore scar at subtonic tip, 2.5-4 x 10-40 µm or rarely conidia almost sessile; conidia subhyaline to pale olivaceous, obclavate to obclavato-cylindric, straight to curved, base obconic to subtruncate, tip subacute, septa indistinct, rarely guttulate, 2-4 x 25-75 µm, or even 125 µm long.
HOSTS: Rubus allegheniensis Porter, Rubus canadensis L., Rubus cuneifolius E. Mere., Rubus fruticosus L., Rubus glandulosus Bell., Rubus hirtus Waldst. & Kit. (R. amoenus Koehl.), Rubus idaeus L., Rubus imperialis Chain. & Schlecht., Rubus loganobaccus Bailey, Rubus corchori folius L.F., Rubus palmata Thunb., Rubus trivialis Michx., Rubus villosus Ait., Rubus vulgaris Weihe & Nees., Rubus sp.
TYPES: Selva, Italy; Rubus fruticosus; Treviso; Sept. 1875; cotype distributed as Saccardo, Mycotheca Veneta 595; (C. septorioides) Fayette Co., W. Virginia; Rubus canadensis; L. W. Nuttall, No. 610; Oct. 15, 1894; (C. garbiniana) Verona, Italy; Rubus fruticosus; C. Massalongo; Oct. 18, 1900.
DISTRIBUTION: Widely distributed in North America and Europe. Also reported from Bermuda, India, and South America. Dr. Togashi sent a specimen from Japan.
 
Taxon name: