Phylum:Ascomycota >> Class: Dothideomycetes >>  Order: Dothideomycetes 
 BCRC Number NO BCRC Number!  
 Scientific Name: Pseudocercospora nicotianae-benthamianae

Pseudocercospora nicotianae-benthamianae Goh & Hsieh. Cercospora and similar fungi from Taiwan, Maw Chang Book Company, Taipei, Taiwan, 1990.

 Description: Leaf spots orbicular to suborbicular, 2-7 mm in diameter, at first the affected tissue is just discolorated but later become whitish with a brown dingy or dark effuse center, identical on both leaf surfaces. Fruiting amphi-gene but chiefly hypophyllous, effuse, dark olivaceous. Secondary mycelium absent. Stromata absent or just a few brown cells. Conidiophores fasciculate, dense, divergent, emerging through the stomata, pale grayish olivaceous, straight to curved, branched, 0-2 geniculate, 0-2 plainly septate, conic or subtruncate at the apex, 40-80 × 4-5 μm, conidial scars unthickened. Conidia cylindric or cylindro-obclavate, pale grayish olivaceous, mostly straight, 3- 12 septate, sometimes slightly constricted at the septa, obtuse or rounded at the apex, obconically truncate at the base, 2-120 × 3-5 μm; hilum unthickened.

Taiwan, Taichung, NCHU Campus, 5 Dec. 1985, holotype NCHUPP-203.

 Habitat: On leaves of Nicotiana benthamiana Domin.





W. H. Hsieh

 Note: Cercospora nicotianae Ell. & Ev. (Proc. Acad. Sci. Phila. 45:170, 1893) and Cercospora nicotianicola Yen (Rev. Mycol., 32, p. 192, 1967) differ from this fungus by their hyaline acicular conidia and the conidial scars. This fungus resembles Pseudocercospora fuligena (Roldan) Deighton (1976) in several aspects but differs by its branched conidiophores. However, they might be synonymous.