| Name | Erysiphe graminis f. agropyri Jaczewski | 
| Authorship | Jaczewski | 
| Rank | Forma | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Erysiphe graminis de Candolle | 
| Citation | 1927 Karm. Opred. Grib. Vyp. 2. Muchn.-Ros. Griby 142 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Erysiphe graminis f. agropyri Jaczewski | 
| Identification made in | [no date] (1) | 
