These are five lists of African violet (Saintpaulia ionantha) diseases.
| Bacterial diseases | |
|---|---|
| Bacterial blight | Dickeya dadantii syn. Erwinia chrysanthemi |
| Crown gall | Agrobacterium tumefaciens |
| Fungal diseases | |
|---|---|
| Crown rot | Sclerotium rolfsii |
| Cylindrocarpon root rot | Cylindrocarpon destructans |
| Fusarium root rot | Fusarium solani |
| Gray mold | Botrytis cinerea |
| Leaf spot | Alternaria sp.Corynespora cassiicola |
| Phytophthora root and crown rot | Phytophthora nicotianae var. parasitica Phytophthora nicotianae var. nicotianae Phytophthora cryptogea |
| Powdery mildew | Oidium sp. |
| Pythium root rot | Pythium sp. |
| Rhizoctonia root and crown rot | Rhizoctonia sp. |
| Viral diseases | |
|---|---|
| Leaf etch | |
| Mosaic | |
| Nematodes, parasitic | |
|---|---|
| Foliar nematode | Aphelenchoides fragariae Aphelenchoides ritzemabosi |
| Nematodes | Criconema sp. Helicotylenchus sp. Pratylenchus pratensis Paratylenchus projectus Rotylenchus brachyurus Scutellonema brachyurum Tylenchorynchus sp. |
| Root knot | Meloidogyne arenaria Meloidogyne hapla Meloidogyne javanica Meloidogyne incognita |
| Miscellaneous diseases and disorders | |
|---|---|
| Marginal leaf burn | Overfertilization |
| Ring spot | Irrigation water temperature much above or below leaf temperature applied to the leaf surface |