Fungal diseases
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| Alternaria leaf blight, stem spot and head rot | Alternaria alternata
= Alternaria tenuis
Alternaria helianthi
= Helminthosporium helianthi
Alternaria helianthicola
Alternaria leucanthemi
Alternaria tenuissima
Alternaria zinniae |
| Botrytis head rot (gray mold) | Botrytis cinerea
Botryotinia fuckeliania [teleomorph] |
| Charcoal rot | Macrophomina phaseolina
= Sclerotium bataticola
= Rhizoctonia bataticola |
| Downy mildew | Plasmopara halstedii
Plasmopara helianthi f. helianthi |
| Fusarium stalk rot | Fusarium equiseti
Gibberella intricans [teleomorph]
Fusarium solani
Nectria haematococca [teleomorph]
Microdochium tabacinum
= Fusarium tabacinum
Monographella cucumerina [teleomorph] |
| Fusarium wilt | Fusarium moniliforme
Gibberella fujikuroi [teleomorph]
Fusarium oxysporum |
| Myrothecium leaf and stem spot | Myrothecium roridum
Myrothecium verrucaria |
| Phialophora yellows | Phialophora asteris |
| Phoma black stem | Phoma macdonaldii
Leptosphaeria lindquistii
= Phoma oleracea var. helianthi-tuberosi [teleomorph] |
| Phomopsis brown stem canker | Phomopsis spp.
Phomopsis helianthi
Diaporthe helianthi [teleomorph] |
| Phymatotrichum root rot (cotton root rot) | Phymatotrichopsis omnivora
= Phymatotrichum omnivorum |
| Phytophthora stem rot | Phytophthora spp.
Phytophthora drechsleri |
| Powdery mildew | Golovinomyces latisporus |
| Pythium seedling blight and root rot | Pythium spp.
Pythium aphanidermatum
Pythium debaryanum
Pythium irregulare |
| Rhizoctonia seedling blight | Rhizoctonia solani
Thanatephorus cucumeris [teleomorph] |
| Rhizopus head rot | Rhizopus arrhizus
= Rhizopus nodosus
Rhizopus microsporus
Rhizopus stolonifer
= Rhizopus nigricans |
| Rust | Puccinia helianthi
Puccinia xanthii
Uromyces junci |
| Sclerotinia basal stalk rot and wilt, mid-stalk rot, head rot | Sclerotinia sclerotiorum
= Sclerotinia libertiana
= Whetzelinia sclerotiorum |
| Sclerotinia basal stalk rot and wilt | Sclerotinia minor |
| Sclerotium basal stalk and root rot (southern blight) | Sclerotium rolfsii
Athelia rolfsii [teleomorph] |
| Septoria leaf spot | Septoria helianthi |
| Verticillium wilt | Verticillium albo-atrum
Verticillium dahliae |
| White rust | Albugo tragopogonis
= Cystopus tragopogonis |
| Yellow rust | Coleosporium helianthi
Coleosporium pacificum
= Coleosporium madiae
Peridermium californicum [anamorph] |
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