Phylum：Ascomycota　>>　Class： Dothideomycetes　>>　 Order： Dothideomycetes 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Pseudocercospora pruni-yedoensis
 
   
   
　Author：

Basionym: Cercospora pruni-yedoensis Sawada, Taiwan Agric. Res. Inst. Rept.85: 120, 1943..

Pseudocercospora pruni-yedoensis [Sawada ex] Goh & Hsieh. Cercospora and similar fungi from Taiwan. Maw Chang Book Company, Taipei, Taiwan, 1990.
   
 
 
 
 
　Description： Leaf spots at first angular, vein-limited, later becoming suborbicular, 1- 4 mm wide, often confluent, brown to yellowish brown, with a narrow dark brown margin, the dead tissue may drop off and forming "shot-hole". Fruiting amphigenous, black punctiform. Secondary mycelium external: hyphae pale olivaceous, repent or arcuate, septate, branched, 2-4 μm wide, bearing secondary conidiophores as side branches. Stromata dark brown, globular, up to 55 μm wide. Primary conidiophores densely fasciculate, pale olivaceous brown, uniform in colour, cylindric, straight to slightly undulate, rarely branched, 0-2 septate, 0-1 geniculate, rounded or subtruncate at the apex, 20- 35 × 3-4 μm, conidial scars unthickened. Secondary conidiophores borne on external secondary mycelial hyphae, similar in respect to the primary ones, 7- 30 × 3-4 μm. Conidia subhyaline to very pale olivaceous, cylindric to cylindro-obclavate, straight to curved, 2-9 septate, subacute to subobtuse at the apex, subtruncate or obconically truncate at the base, 13-70 × 2.5-3 μm, hilum unthickened.
 
 
 
 
 
　Specimens：

Taiwan, 30 Nov. 1930, Herb. NTU-PPE, on Prunus campanulatti Maxim. and P. yedoensis Matsum., holotype Cercospora pruni-yedoensis Sawada; Taipei, 30 Oct. 1919, on Prunus persica Stokes, labelled as Cercospora rubro-tincta Ell. & Ev.
 
 
 
　Habitat： On leaves of Prunus spp.
 
 
 
　Distribution：

Taiwan.
 
 
 
　References：

null
   
   
   
　Provided：

W. H. Hsieh
 
 
　Note： This fungus differs from Cercoseptoria prunicola (Ell. & Ev.) Yen (1981b) by the presence of well developed secondary mycelium, however they may be synonymous. Cercospora rubro-tincta Ell. & Ev. (Jour. Mycol. 3:20. 1887) differs from Cercoseptoria prunicola (Ell. & Ev.) Yen by its wider conidia (2-5.5 μm). The specimen collected by Sawada labelled as C. rubro-tincta Ell. & Ev. has conidia of dimension 23-50 × 2-3 μm, and the presence of external ta secondary mycelium, therefore it is regarded as the same fungus as this fungus.