| Host genus | Fungal species | Symptoms and notes |
| Dactylis | Claviceps purpurea | The ergot fungus, infecting inflorescences and forming sclerotia from modified seeds. Highly toxic |
| Phyllachora dactylidis | Tar spot of leaves, not causing substantial damage | |
| Digitalis | Colletotrichum fuscum | Causes leaf spots |
| Ramularia digitalis-ambiguae | Causes leaf spots | |
| Dryas | Isothea rhytismoides | Inconspicuous tar spot of leaves |