Phylum:Ascomycota >> Class: Dothideomycetes >>  Order: Dothideomycetes 
 BCRC Number NO BCRC Number!  
 Scientific Name: Cercospora ageraticola

Cercospora ageraticola Goh & Hsieh, Trans. mycol. Soc. R.O.C. 4(2):39-56 1989.

 Description: Leaf spots irregular, without distinct margin, dark brown on upper surface, grayish brown at corresponding lower surface, 1-5 mm in width, often confluent, forming large discolorated area, tissue adjacent to the spot turns yellow. Fruiting amphigenous. Stromata lacking. Conidiophores borne singly or up to 3 in a fascicle, medium dark brown, paler toward the attenuated apex, straight or geniculate, septate, not branched, scars distinctly thickened, 45- 200 × 4-5 μm. Conidia hyaline, acicular to obdavate, indistinctly multiseptate, straight to mildly curved, acute at the apex, truncate or short obconically truncate at the base with a thickened hilum, 25-110 × 3-4.5 μm.

Taiwan, Taichung, NCHGU Campus, 30 July, 1984, holotype, NCHUPP-22.

 Habitat: On leaves of Ageratum houstonianum Mill.



Chupp, C. 1954.


W. H. Hsieh

 Note: This fungus sporulates well on PDA culture. Cercospora perfoliata Ell. & Ev.(Jour. Mycol. 5:71, 1889) on Eupatorium spp. and Ageratum conyzoides L. differs from this fungus by its non-fasciculate conidiophores which borne on external mycelial hyphae, and by its hyaline, cylindric, catenulate conidia. Cercospora aciculina Chupp (Chupp, 1954) on Ageratum conyzoides differs from this fungus by its effuse fruiting, dense fascicles of conidiophores and by its hyaline, needle-like and relatively narrower (1.5-3 μm wide) conidia.