| Kingdom: Fungi |
| Phylum: Ascomycota |
| Subphylum: Pezizomycotina |
| Class: Leotiomycetes |
| Order: Erysiphales |
| Family: Erysiphaceae |
| Genus: Erysiphe |
| Subject: Erysiphe cruciferarum Opiz ex L. Junell |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Subclass: Dilleniidae |
| Order: Capparales |
| Family: Brassicaceae |
| Genus: Brassica |
| Subject: Brassica spp. |