Other Diseases of Flowers
Ornamental Flowers and Foliage |
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| Host | Disease | Pathogen | Occurrence |
| African Violet | Root rot Powdery mildew |
Pythium spp. Oidium sp. |
Widespread Widespread |
| Begonia | Bacterial leaf spot Botrytis blight Powdery mildew Root and stem rot Tomato ring spot Tomato spotted wilt |
Pseudomonas sp. Botrytis cinerea Erysiphe cichoracearum Pythium sp. virus virus |
Occasional Widespread Widespread Widespread Occasional Occasional |
| Carnation | Fusarium wilt | Fusarium oxysporum f.dianthi | Occasional |
| Chrysanthemum | Tomato ring spot Tomato spotted wilt |
virus virus |
Occasional Occasional |
| Clematis | Crown rot | Rhizoctonia sp. | Occasional |
| Coleus | Botrytis blight | Botrytis cinerea | Widespread |
| English Ivy | Bacterial leaf spot Fungal leaf spot |
Xanthomonas sp. several fungi |
Widespread Widespread |
| Geranium | Bacterial leaf spot Black leg Botrytis blight Crown gall Edema (oedema) Root-knot nematode Rust Wilt |
Xanthomonas pelargonii Pythium sp. Botrytis cinerea Agrobacterium tumefaciens environmental Meloidogyne spp. Puccinia pelargonii-zonalis Verticillium dahliae |
Occasional Occasional Widespread Occasional Widespread Occasional Occasional Widespread |
| Gladiolus | Yellows | Fusarium oxysporum | Occasional |
| Hollyhock | Rust | Puccinia malvacearum | Widespread |
| Hyacinth | Bacterial soft rot | Erwinia carotovora | Occasional |
| Iris | Bacterial soft rot Rhizome rot Root rot |
Erwinia carotovora Botrytis convoluta Fusarium sp. |
Occasional Occasional Occasional |
| Marigold | Root rot White mold |
Pythium sp. Sclerotinia sclerotiorum |
Occasional Widespread |
| Pansy | Powdery mildew Root rot |
Erysiphe cichoracearum Phytophthora sp. |
Occasional Widespread |
| Peony | Dry root rot | Fusarium sp. | Occasional |
| Petunia | Root-knot nematode Root rot White mold |
Meloidogyne sp. Pythium sp., Phytophthorasp., Rhizoctonia sp. Sclerotinia sclerotiorum |
Occasional Widespread Widespread |
| Poinsettia | Root rot Root and crown rot |
Pythium spp. Rhizoctonia solani |
Widespread Occasional |
| Rose | Black spot Crown gall Downy mildew Mosaic Powdery mildew Root rot Rust |
Marssonina rosae Agrobacterium tumefaciens Peronospora sparsa virus Sphaerotheca pannosa Phytophthora sp. Phragmidium mucronatum |
Occasional Widespread Rare Widespread Widespread Widespread Occasional |
| Snapdragon | Downy mildew Rust Wilt White mold |
Peronospora antirrhini Puccinia antirrhini Verticillium albo-atrum Sclerotinia sclerotiorum |
Occasional Occasional Widespread Widespread |
| Vinca minor | Die-back Root rot |
Phoma exigua Rhizoctonia solani |
Widespread Widespread |
| Zinnia | Powdery mildew White mold |
Erysiphe cichoracearum Sclerotinia sclerotiorum |
Widespread Widespread |
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