| Fungal diseases |
|
|---|---|
| Armillaria root rot | Armillaria mellea |
| Black root rot | Thielaviopsis basicola |
| Blackleg Cutting rot |
Pythium sp. |
| Botryosphaeria stem rot | Botryosphaeria ribis |
| Botrytis blight | Botrytis cinerea |
| Cottony stem rot | Sclerotinia sclerotiorum |
| Damping-off |
Pythium sp. |
| Downy mildew | Peronospora conglomerata |
| Fusarium cutting rot | Fusarium sp. |
| Glomerella stem rot | Glomerella cingulata |
| Leaf mold |
Aspergillus fischerianus |
| Leaf spot |
Alternaria alternata |
| Phytophthora root rot | Phytophthora spp. |
| Powdery mildew | Erysiphe communis |
| Pythium root rot | Pythium spp. |
| Rhizoctonia root and crown rot |
Rhizoctonia solani |
| Rust | Puccinia pelargonii-zonalis |
| Verticillium wilt |
Verticillium albo-atrum |
Read more about this topic: List Of Geranium Diseases
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