Diseases of Sunflower
(Helianthus annuus L.)
and Jerusalem Artichoke (H. tuberosus L.)

T. J. Gulya and S. Masirevic, primary collators (last update 3/15/93)

BACTERIAL DISEASES

Apical chlorosis

Pseudomonas syringae pv. tagetis (Hellmers) Young et al.

Bacterial leaf spot

Pseudomonas syringae pv. aptata (Brown and Jamieson)
   Young et al.

P. cichorii (Swingle) Stapp

P. syringae pv. helianthi (Kawamura) Young et al.

P. syringae pv. mellea (Johnson) Young et al.

Bacterial wilt

Pseudomonas solanacearum (Smith) Smith

Crown gall

Agrobacterium tumefaciens (Smith and Townsend) Conn

Erwinia stalk rot and head rot

Erwinia carotovora subsp. carotovora (Jones) Bergey et al.

E. carotovora subsp. atroseptica (van Hall) Dye

FUNGAL DISEASES

Alternaria leaf blight, stem spot and head rot

Alternaria alternata (Fr.:Fr.) Keissl. = A. tenuis Nees

• A. helianthi (Hansf.) Tubaki & Nishihara
• = Helminthosporium helianthi Hansf.
• A. helianthicola G.N. Rao & Rajagopalan
• A. leucanthemi E.S. Nelen
• A. tenuissima (Kunze:Fr.) Wiltshire
• A. zinniae M.B. Ellis

Botrytis head rot (gray mold)

Botrytis cinerea Pers.:Fr.

(teleomorph: Botryotinia fuckeliania (de Bary) Whetzel)

Charcoal rot

Macrophomina phaseolina (Tassi) Goidanich

= Sclerotium bataticola Taubenhaus

= Rhizoctonia bataticola (Taubenhaus) E.J. Butler

Downy mildew

Plasmopara halstedii (Farl.) Berl. & De Toni in Sacc.

P. helianthi Novot. f. helianthi

Fusarium stalk rot

Fusarium equiseti (Corda) Sacc.

(teleomorph: Gibberella intricans Wollenweb.)

F. solani (H. Mart.) Sacc.

(teleomorph: Nectria haematococca Berk. & Broome)

Microdochium tabacinum (Van Beyma) Arx

= Fusarium tabacinum (Van Beyma) Gams

(teleomorph: Monographella cucumerina (Lindfors) Arx)

Fusarium wilt

Fusarium moniliforme J. Sheld.

(teleomorph: Gibberella fujikuroi (Sawada) Ito in Ito &
   K. Kimura)

F. oxysporum Schlechtend.:Fr.

Myrothecium leaf and stem spot

Myrothecium roridum Tode:Fr.

M. verrucaria (Albertini & Schwein.) Ditmar:Fr.

Phialophora yellows

Phialophora asteris (Dowson) Burge & Isaac

Phoma black stem

Phoma macdonaldii Boerema

(teleomorph: Leptosphaeria lindquistii Frezzi)

= P. oleracea Sacc. var. helianthi-tuberosi Sacc.

Phomopsis brown stem canker

Phomopsis spp.

P. helianthi M. Muntanola-Cvetkovic et al.

(teleomorph: Diaporthe helianthi M. Muntanola-Cvetkovic et al.)

Phymatotrichum root rot (cotton root rot)

Phymatotrichopsis omnivora (Duggar) Hennebert

= Phymatotrichum omnivorum Duggar

Phytophthora stem rot

Phytophthora spp.

P. drechsleri Tucker

Powdery mildew

Erysiphe cichoracearum DC.

(anamorph: Oidium asteris-punicei Peck)

E. cichoracearum DC. var. latispora U. Braun

(anamorph: Oidium latisporum U. Braun)

Leveillula compositarum Golovin f. helianthi

L. taurica (Lév.) G. Arnaud

(anamorph: Oidiopsis sicula Scalia)

Sphaerotheca fuliginea (Schlechtend.:Fr.) Pollacci

Pythium seedling blight and root rot

Pythium spp.

P. aphanidermatum (Edson) Fitzp.

P. debaryanum Auct. non R. Hesse

P. irregulare Buissman

Rhizoctonia seedling blight

Rhizoctonia solani Kühn

(teleomorph: Thanatephorus cucumeris (A.B. Frank) Donk)

Rhizopus head rot

Rhizopus arrhizus A. Fischer

= R. nodosus Namyslowski

R. microsporus Tiegh.

R. stolonifer (Ehrenb.:Fr.) Vuill.

= R. nigricans Ehrenb.

Rust

Pucciniahelianthi Schwein.

P. xanthii Schwein.

Uromyces junci (Desmaz.) Tul.

Sclerotinia basal stalk rot and wilt, mid-stalk rot, head rot

Sclerotinia sclerotiorum (Lib.) de Bary

= S. libertiana Fuckel

= Whetzelinia sclerotiorum (Lib.) Korf & Dumont

Sclerotinia basal stalk rot and wilt

Sclerotinia minor Jagger

Sclerotium basal stalk and root rot (southern blight)

Sclerotium rolfsii Sacc.

(teleomorph: Athelia rolfsii (Curzi) Tu & Kimbrough)

Septoria leaf spot

Septoria helianthi Ellis & Kellerm.

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

V. dahliae Kleb.

White rust

Albugo tragopogonis (Pers.) S.F. Gray

= Cystopus tragopogonis (Pers.) J. Schröt.

Yellow rust

Coleosporium helianthi (Schwein.) Arth.

C. pacificum Cummins

= C. madiae Cooke, nom. illeg.

(anamorph: Peridermium californicum Arth. & F. Kern)

NEMATODES, PARASITIC

Dagger, American

Xiphinema americanum Cobb

Pin

Paratylenchus projectus Jenkins

Lesion

Pratylenchus spp.

P. hexincisus Taylor & Jenkins

Reniform

Rotylenchulus spp.

Rotylenchulus reniformis Linford & OlivIera

Root knot

Meloidogyne arenaria (Neal) Chitwood

M. incognita (Kofoid & White) Chitwood

M. javanica (Treub) Chitwood

Spiral

Helicotylenchus sp.

Stunt

Tylenchorhynchus nudus Allen

Quinisulcius acutus (Allen) Siddiqi

PARASITIC HIGHER PLANTS

Broomrape

Orobanche aegyptiaca Pers.

O. cernua Loefl.

O. cumana Wallr.

O. ramosa L.

Dodder

Cuscuta glomerata Choisy

C. indecora Choisy

C. pentagona Engelm.

VIRUS DISEASES

Aster yellows

Aster yellows MLO

Sunflower mosaic

Cucumber mosaic virus

Sunflower virus

Tobacco mosaic virus