This article is a list of diseases of sunflower

Sunflower

Sunflower is an annual plant native to the Americas. It possesses a large inflorescence . The sunflower got its name from its huge, fiery blooms, whose shape and image is often used to depict the sun. The sunflower has a rough, hairy stem, broad, coarsely toothed, rough leaves and circular heads...

s (Helianthus annuus) and Jerusalem Artichoke

Jerusalem artichoke

The Jerusalem artichoke , also called the sunroot, sunchoke, earth apple or topinambour, is a species of sunflower native to eastern North America, and found from Eastern Canada and Maine west to North Dakota, and south to northern Florida and Texas...

 (H. tuberosus).

Bacterial diseases

Bacterial diseases
Apical chlorosis	Pseudomonas syringae Pseudomonas syringae Pseudomonas syringae is a rod shaped, Gram-negative bacterium with polar flagella. It is a plant pathogen which can infect a wide range of plant species, and exists as over 50 different pathovars, all of which are available to legitimate researches via international culture collections such as the... pv. tagetis
Bacterial leaf spot	Pseudomonas syringae Pseudomonas syringae Pseudomonas syringae is a rod shaped, Gram-negative bacterium with polar flagella. It is a plant pathogen which can infect a wide range of plant species, and exists as over 50 different pathovars, all of which are available to legitimate researches via international culture collections such as the... pv. aptata P. cichorii Pseudomonas cichorii Pseudomonas cichorii is a Gram-negative soil bacterium that is pathogenic to plants. It has a wide host range, and can have an important economical impact on lettuce, celery and chrysanthemum crops.. P. cichorii was first isolated on endives , from which it derives its name. It produces... Pseudomonas syringae Pseudomonas syringae Pseudomonas syringae is a rod shaped, Gram-negative bacterium with polar flagella. It is a plant pathogen which can infect a wide range of plant species, and exists as over 50 different pathovars, all of which are available to legitimate researches via international culture collections such as the... pv. helianthi Pseudomonas syringae Pseudomonas syringae Pseudomonas syringae is a rod shaped, Gram-negative bacterium with polar flagella. It is a plant pathogen which can infect a wide range of plant species, and exists as over 50 different pathovars, all of which are available to legitimate researches via international culture collections such as the... pv. mellea
Bacterial wilt	Pseudomonas solanacearum
Crown gall	Agrobacterium tumefaciens Agrobacterium tumefaciens Agrobacterium tumefaciens is the causal agent of crown gall disease in over 140 species of dicot. It is a rod shaped, Gram negative soil bacterium...
Erwinia stalk rot and head rot	Erwinia carotovora subsp. carotovora E. carotovora subsp. atroseptica

Fungal diseases

{| class="wikitable" style="clear"
! colspan=2| Fungal diseases

|-
|Alternaria leaf blight, stem spot and head rot
||
Alternaria alternata

Alternaria alternata

Alternaria alternata has been recorded causing leaf spot and other diseases on over 380 host species. It is opportunistic pathogen on numerous hosts causing leaf spots, rots and blights on many plant parts...

Helminthosporium helianthi

Alternaria helianthicola

Alternaria helianthicola

Alternaria helianthicola is a plant pathogen.- External links :* *...

Alternaria leucanthemi

Alternaria leucanthemi

Alternaria leucanthemi is a plant pathogen.- External links :* *...

Alternaria tenuissima

Alternaria tenuissima

Alternaria tenuissima is a plant pathogen.- External links :* *...

Alternaria zinniae

Alternaria zinniae

Alternaria zinniae is a plant pathogen.- External links :* *...

|-
|Botrytis head rot (gray mold)
||
Botrytis cinerea

Botrytis cinerea

Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as botrytis bunch rot; in horticulture, it is usually called grey mould or gray mold.The fungus gives rise to two different kinds of...

Botryotinia fuckeliania

Botrytis cinerea

Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as botrytis bunch rot; in horticulture, it is usually called grey mould or gray mold.The fungus gives rise to two different kinds of...

[teleomorph]
|-
|Charcoal rot
||
Macrophomina phaseolina

Macrophomina phaseolina

Macrophomina phaseolina is a Botryosphaeriaceae fungus that is a plant pathogen that causes charcoal rot on many plant species including Zea mays and Pinus elliottii.- External links :* *...

Rhizoctonia bataticola
|-
|Downy mildew
||
Plasmopara halstedii

Plasmopara halstedii

Plasmopara halstedii is a plant pathogen.- External links :**...

Plasmopara helianthi f. helianthi

Plasmopara helianthi f. helianthi

Plasmopara helianthi f. helianthi is a plant pathogen.-External links:* *...

|-
|Fusarium stalk rot
||
Fusarium equiseti

Gibberella intricans

Gibberella intricans

Gibberella intricans is a plant pathogen.- External links :* *...

[teleomorph]

Fusarium solani

Nectria haematococca [teleomorph]

Microdochium tabacinum
Fusarium tabacinum

Monographella cucumerina

Monographella cucumerina

Monographella cucumerina is a fungal plant pathogen.- External links :* *...

[teleomorph]
|-
|Fusarium wilt
||
Fusarium moniliforme

Gibberella fujikuroi

Gibberella fujikuroi

Gibberella fujikuroi is a fungal plant pathogen. It causes bakanae disease in rice seedlings, by overloading them with the phytohormone gibberellin as its own metabolic byproduct.- External links :* * *...

[teleomorph]

Fusarium oxysporum

Fusarium oxysporum

Fusarium oxysporum Schlecht. as emended by Snyder and Hansen comprises all the species, varieties and forms recognized by Wollenweber and Reinking within an infrageneric grouping called section Elegans...

|-
|Myrothecium leaf and stem spot
||
Myrothecium roridum

Myrothecium roridum

Myrothecium roridum is a plant pathogen. Myrotoxin B has been isolated from it.- External links :* *...

Myrothecium verrucaria

Myrothecium verrucaria

Myrothecium verrucaria is a plant pathogen. It is common throughout the world, often found on materials such as paper, textiles, canvas and cotton. It is a highly potent cellulose decomposer....

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|Phialophora yellows
||
Phialophora asteris

Phialophora asteris

Phialophora asteris is an ascomycete fungus that is a plant pathogen.- External links :* *...

|-
|Phoma black stem
||
Phoma macdonaldii

Leptosphaeria lindquistii

Leptosphaeria lindquistii

Leptosphaeria lindquistii is a plant pathogen.- External links :* *...

Phoma oleracea var. helianthi-tuberosi [teleomorph]
|-
|Phomopsis brown stem canker
||
Phomopsis

Phomopsis

Phomopsis is a genus of ascomyceta fungi.-Species:Species include:* Phomopsis arnoldiae* Phomopsis asparagi* Phomopsis asparagicola* Phomopsis cannabina* Phomopsis caricae-papayae* Phomopsis coffeae* Phomopsis elaeagni...

spp.

Phomopsis helianthi

Diaporthe helianthi

Diaporthe helianthi

Diaporthe helianthi is a plant pathogen.- External links :* *...

[teleomorph]
|-
|Phymatotrichum root rot (cotton root rot)
||
Phymatotrichopsis omnivora
Phymatotrichum omnivorum
|-
|Phytophthora stem rot
||
Phytophthora

Phytophthora

Phytophthora is a genus of plant-damaging Oomycetes , whose member species are capable of causing enormous economic losses on crops worldwide, as well as environmental damage in natural ecosystems. The genus was first described by Heinrich Anton de Bary in 1875...

spp.

Phytophthora drechsleri

Phytophthora drechsleri

Phytophthora drechsleri is a plant pathogen.- External links :**...

|-
|Powdery mildew
||
Erysiphe cichoracearum

Erysiphe cichoracearum

Erysiphe cichoracearum is a plant pathogen that causes powdery mildew disease of cucurbits, including melon, cucumber, pumpkin, and squash. The primary symptoms are white, powder-like spots on the leaves and stems. Sphaerotheca fuliginea causes a similar looking powdery mildew of cucurbits.-...

Oidium asteris-punicei [anamorph]

Erysiphe cichoracearum var. latispora

Oidium latisporum[anamorph]

Leveillula compositarum f. helianthi

Leveillula compositarum f. helianthi

Leveillula compositarum f. helianthi is a plant pathogen.-External links:* *...

Leveillula taurica

Leveillula taurica

Leveillula taurica is a plant pathogen.- External links :* *...

Oidiopsis sicula [anamorph]

Sphaerotheca fuliginea

Sphaerotheca fuliginea

Sphaerotheca fuliginea is a plant pathogen that causes powdery mildew on cucurbits. Sphaerotheca fuliginea and Erysiphe cichoracearum are the two most commonly recorded fungi causing cucurbit powdery mildew. In the past, Erysiphe cichoracearum was considered to be the primary causal organism...

|-
|Pythium seedling blight and root rot
||
Pythium

Pythium

Pythium is a genus of parasitic oomycete. Most species are plant parasites, but Pythium insidiosum is an important pathogen of animals...

spp.

Pythium aphanidermatum

Pythium aphanidermatum

Pythium aphanidermatum is a plant pathogen.- External links :**...

Pythium debaryanum

Pythium debaryanum

Pythium debaryanum is a plant pathogen.- External links :**...

Pythium irregulare

Pythium irregulare

Pythium irregulare is a plant pathogen.- External links :**...

|-
|Rhizoctonia seedling blight
||
Rhizoctonia solani

Rhizoctonia solani

Rhizoctonia solani is a plant pathogenic fungus with a wide host range and worldwide distribution. This plant pathogen was discovered more than 100 years ago. Rhizoctonia solani frequently exists as thread-like growth on plants or in culture. Asexual spores are not produced, only the sexual stage...

Thanatephorus cucumeris [teleomorph]
|-
|Rhizopus head rot
||
Rhizopus arrhizus

Rhizopus arrhizus

Rhizopus arrhizus is a fungus of the family Mucoraceae, characterized by sporangiophores that arise from nodes at the point where the rhizoids are formed and by a hemispherical columella...

Rhizopus nigricans

Rhizopus nigricans

Rhizopus nigricans is a fungus commonly known as bread mold and is the most common species of Rhizopus. It is found on old food and in soils and even in children's sandboxes. The genus contains some 50 species and bread mold is sometimes confused with species of Mucor or other species of Rhizopus...

|-
|Rust
||
Puccinia helianthi

Puccinia helianthi

Puccinia helianthi is a plant pathogen that causes rust on sunflower.- External links :* *...

Puccinia xanthii

Puccinia xanthii

Puccinia xanthii is a plant pathogen which causes rust on Xanthium occidentale and can be used as a form of biological control where this plant is an invasive species.- External links :* *...

Uromyces junci
|-
|Sclerotinia basal stalk rot and wilt, mid-stalk rot, head rot
||
Sclerotinia sclerotiorum

Sclerotinia sclerotiorum

Sclerotinia sclerotiorum is a plant pathogenic fungus and can cause a disease called white mold if conditions are correct. S. sclerotiorum can also be known as cottony rot, watery soft rot, stem rot, drop, crown rot and blossom blight...

Whetzelinia sclerotiorum
|-
|Sclerotinia basal stalk rot and wilt
||
Sclerotinia minor

Sclerotinia minor

Sclerotinia minor is a plant pathogen.- External links :* *...

|-
|Sclerotium basal stalk and root rot (southern blight)
||
Sclerotium rolfsii

Athelia rolfsii

Athelia rolfsii

Athelia rolfsii is a corticioid fungus in the family Atheliaceae. It is a facultative plant pathogen and is the causal agent of "southern blight" disease in crops.-Taxonomy:...

[teleomorph]
|-
|Septoria leaf spot
||
Septoria helianthi

Septoria helianthi

Septoria helianthi is a fungal plant pathogen.- External links :* *...

|-
|Verticillium wilt
||
Verticillium albo-atrum

Verticillium albo-atrum

Verticillium albo-atrum is a plant pathogen.-External links:* *...

Verticillium dahliae

Verticillium dahliae

Verticillium dahliae is a fungal plant pathogen. It causes verticillium wilt in many plant species, causing leaves to curl and discolor. It may cause death in some plants.- External links :* *...

|-
|White rust
||
Albugo tragopogonis

Albugo tragopogonis

Albugo tragopogonis, Sunflower White Rust, is an oomycete plant pathogen, although some sources still regard it as a fungal organism.Albugo tragopogonis is the old name for Pustula tragopogonis, the causal agent of white blister disease on goatsbeard...

Cystopus tragopogonis
|-
|Yellow rust
||
Coleosporium helianthi

Coleosporium helianthi

Coleosporium helianthi is a plant pathogen.- External links :...

Coleosporium pacificum

Coleosporium pacificum

Coleosporium pacificum is a plant pathogen.- External links :...

Nematodes, parasitic

{| class="wikitable" style="clear"
! colspan=2| Nematodes, parasitic

|-
|Dagger, American
||
Xiphinema americanum

Xiphinema americanum

Xiphinema americanum is a plant pathogenic nematode. It is one of many species that belongs to the genus Xiphinema. It was first described by N. A. Cobb in 1913, who found it on both sides of the United States on the roots of grass, corn, and citrus trees. Not only is Xiphinema americanum known to...

|-
|Pin
||
Paratylenchus projectus

Paratylenchus projectus

Paratylenchus projectus is a plant pathogenic nematode.- External links :*...

|-
|Lesion
||
Pratylenchus

Pratylenchus

Pratylenchus is a genus of plant-parasitic nematodes responsible for root lesions on many plant hosts in temperate regions around the world. Lesion nematodes are migratory endoparasites that enter the host root for feeding and reproduction and move freely through or out of the root tissue. They do...

spp.

Pratylenchus hexincisus

Pratylenchus hexincisus

Pratylenchus hexincisus is a plant pathogenic nematode....

|-
|Reniform
||
Rotylenchulus spp.

Rotylenchulus reniformis

Rotylenchulus reniformis

-History and significance:Rotylenchulus reniformis is a plant parasite nematode with a worldwide distribution in the tropical and subtropical regions. This nematode has a wide host range infecting plants in many species around the word. It belongs to the Family Hoplolaimidae; it was first...

|-
|Root knot
||
Meloidogyne arenaria

Meloidogyne arenaria

Meloidogyne arenaria is a plant pathogenic nematode.- External links :*...

Meloidogyne incognita

Meloidogyne incognita

The Meloidogyne incognita is a nematode, a type of roundworm, in the family Heteroderidae. It is an important plant parasite classified in parasitology as a root-knot nematode, as it prefers to attack the root of its host plant....

Meloidogyne javanica

Meloidogyne javanica

Meloidogyne javanica is a plant pathogenic nematode. It is one of the tropical Root-knot Nematodes and a major agricultural pest in many countries. Meloidogyne javanica reproduces by obligatory mitotic parthenogenesis .- External links :*...

|-
|Spiral
||
Helicotylenchus

Helicotylenchus

Helicotylenchus is a genus of nematodes in the family Hoplolaimidae.-Diagnosis:Hoplolaimidae. Female : Body vermiform, spiral to straight. Labial region continuous to slightly offset, rounded or anteriorly flattened, generally annulated but never longitudinally striated; anterior lip annulus...

sp.
|-
|Stunt
||
Tylenchorhynchus nudus

Tylenchorhynchus nudus

Tylenchorhynchus nudus is a plant pathogenic nematode cause dwarfing disease specially at rice plant.- External links :*...

Quinisulcius acutus

Quinisulcius acutus

Quinisulcius acutus is a plant pathogenic nematode.- External links :* *...

|-
|}

Phytoplasma and Viral diseases

{| class="wikitable" style="clear"
! colspan=2| Viral diseases

|-
|Aster yellows
||Aster yellows

Aster yellows

Aster yellows is a chronic, systemic plant disease caused by a bacterium-like organism called a phytoplasma. The aster yellows phytoplasma affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family. Symptoms are variable and can include phyllody, virescence,...

 phytoplasma

Phytoplasma

Phytoplasma are specialised bacteria that are obligate parasites of plant phloem tissue and transmitting insects . They were first discovered by scientists in 1967 and were named mycoplasma-like organisms or MLOs. They cannot be cultured in vitro in cell-free media...

|-
|Sunflower mosaic
||Cucumber mosaic virus

Cucumber mosaic virus

Cucumber mosaic virus is a plant pathogenic virus in the family Bromoviridae.It is the type member of the plant virus genus, Cucumovirus. This virus has a worldwide distribution and a very wide host range. In fact it has the reputation of having the widest host range of any known plant virus...

|-
|Sunflower virus
||Tobacco mosaic virus

Tobacco mosaic virus

Tobacco mosaic virus is a positive-sense single stranded RNA virus that infects plants, especially tobacco and other members of the family Solanaceae. The infection causes characteristic patterns on the leaves . TMV was the first virus to be discovered...

|-
|Chlorotic Mottle
||Sunflower Chlorotic Mottle virus (SuCMoV)
|-
|}