Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Mycosphaerella brassicola

Basionym: Sphaeria brassicicola Duby, Botanicon Gallicum 2:712. 1830.

Mycosphaerella brassicola (Duby) Lindau, Die Naturl. Pflanzenf. 1: 424. 1897.

 Description: Leaf spots necrotic, epiphyllous, circular, 0.5-1 cm, pale brown, inner often have scattered black dot and a black dot ring. Ascomata immersed, becoming erumpent, gregarious, some-times confluent, compressed globose to globose, 76-120 × 80-120 μm, slightly papillate. Peridium 8-20 μm wide, composed of 3-4 layers of reddish brown to dark brown, angular thin walled cells, with hyphae penetrating the host tissue, Pseudoparaphyses lacking. Asci 37-53 × 12-15 μm, bitunicate, basal, obovoid to clavate, with thickened inner wall at the apex and becoming thinner along the sides and base, 8-spored, maturing at different times. Ascospores 10-18 × 2.4-3.2 μm, fucoid, ends obtuse, straight or slightly curved, triseriate in the widest part of ascus, hyaline, smooth, 1-septate, in the middle or near the middle.

Taiwan, Nantou County, Meifeng, Oct. 1999, NCHUPP-2544.

 Habitat: On living leaves of Brassica oleracea var. capitata DC.

Europe, New Zealand, North America, Taiwan.


Wang, CL. 2000.


W. H. Hsieh

 Note: The species from Taiwan has somewhat smaller ascospores and the anamorph was not found.