| Kingdom: Fungi |
| Phylum: Ascomycota |
| Subphylum: Pezizomycotina |
| Class: Dothideomycetes |
| Subclass: Dothideomycetidae |
| Order: Pleosporales |
| Family: Pleosporaceae |
| Genus: Alternaria |
| Subject: Alternaria brassicicola (Schwein.) Wiltshire |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Subclass: Dilleniidae |
| Order: Capparales |
| Family: Brassicaceae |
| Genus: Brassica |
| Subject: Brassica oleracea var. capitata L. |