Phylum:Ascomycota >> Class: Dothideomycetes >>  Order: Dothideomycetes 
   
 
 BCRC Number NO BCRC Number!  
   
 Scientific Name: Passalora koepkei
 
   
   
 Author:

Basionym: Cercospora koepkei Kr?ger, Meded. Proefestn. W. Java, Kagok-Tegal 1:113, 1890.

Passalora koepkei (W. Kr?ger) U. Braun & Crous, Mycosphaerella and its anamorphs: 1. Names published in Cercospora and Passalora: 238. 2003.

= Mycovellosiella koepkei (Kr?ger) Deighton. Mycol. Pap. 144:20-23, 1979.

   
 
 
 
 
 Description: Leaf spots at first yellowish irregular to subelliptic areas of variable size, later confluent and becoming larger, reddish or purplish brown, elongated or irregular, up to 5 mm long. In later stages, the infected leaves may become straw coloured and dried up, shrive and die prematurely. Fruiting amphigenous, but mostly hypophyllous, forming a brown mould-like covering. Stromata small, composed of a few brown cells, about 20 μm wide. Secondary mycelium external: hyphae pale olivaceous, repent, smooth, 2-3 μm wide, arising as branches from the base of the fasciculate primary conidiophores and bearing secondary conidiophores as lateral branches. Conidiophores up to 15 in a fascicle and arising singly from the external secondary mycelial hyphae, pale to medium olivaceous brown, paler towards the apex, erect, geniculate, multiseptate, simple or rarely branched, 30-195 × 4.5-7 μm; conidial scars conspicuously thickened, 1.5-2 μm wide. Conidia hyaline to pale olivaceous, fusiform to obclavate, nearly all straight, 1-7 (mostly 3-) septate, not constricted, not catenulate, conic at the apex, obconic or obconically truncate at the base with a thickened hilum, 20-67 × 4-6.5 μm.
 
 
 
 
 
 Specimens:

Taiwan, Kaohsiung, 5 Nov. 1909, Herb. NTU-PPE.

 
 
 
 Habitat: On leaves of Saccharum officinarum L., termed as ‘Yellow spot of sugarcane’
 
 
 
 Distribution:

Africa, Australia, British Solomon Islands, Fiji, India, Japan, Malaysia, Philippines, South America, Sri Lanka, Taiwan, Thailand. [CMI Distribution Map No 341].

 
 
 
 References:

Hsieh, WH and Goh, TK. 1900.

   
   
   
 Provided:

W. H. Hsieh

 
 
 Note: null