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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