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Diseases of Beet (Beta vulgaris L.)

Robert M. Harveson, primary collator (last update: 6/1/16)

BACTERIAL DISEASES

Bacterial leaf spot

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

Bacterial pocket

Pantoea agglomerans pv. betae (Beijerinck) Gavin et al.

Bacterial soft rot

Pectobacterium carotovora subsp. carotovora (Jones) Hauben et al. emend. Garden et al.

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

Bacterial vascular necrosis and rot

Pectobacterium betavasculorum (Thomson et al.) Gardan et al.

       (syns. Erwinia carotovora subsp. betavasculorum (van Hall) Dye; Pectobacterium

       carotovora subsp. betavasculorum (van Hall) Hauben et al.)

Beet latent rosette

Unnamed rickettsia-like organism

Crown gall

Agrobacterium tumefaciens (Smith & Townsend) Conn

Scab

Streptomyces scabiei corr. (ex Thaxter) Lambert & Loria

Silvering disease

Curtobacterium flaccumfaciens pv. betae (Keyworth et al.) Collins & Jones

Syndrome des basses richesses

Associated with ‘Candidatus Arsenophonus phytopathogenicus’ and ‘Candidatus Phlomobacter fragariae’ Zreik et al.

Yellow wilt

Unnamed phytoplasma, a rickettsia-like organism, or both

FUNGAL and OOMYCETE DISEASES

Foliar Diseases

Alternaria leaf spot

Alternaria alternata (Fr.:Fr.) Keissl.

       (syn. Alternaria tenuis Nees)

Alternaria brassicae (Berk.) Sacc.

Beet rust

 Uromyces betae (Pers.) J. Kickx. fil.

Beet seedling rust

 Puccinia subnitens Dietel

Beet tumor or crown wart

Physoderma leproides (Trab.) Karling

       (syn. Urophlyctis leproides (Trab.) Magnus)

Cercospora leaf spot

Cercospora beticola Sacc.

Downy mildew

 Peronospora farinosa f. sp. betae Byford

       (syn. Peronospora schachtii Fuckel)

Gray mold

Botrytis cinerea Pers.:Fr.

       (syn. Botryotinia fuckeliana (de Bary) Whetzel)

Phoma leaf spot

Neocamarosporium betae (Berl.) Ariyawansa

       (syns. Phoma betae A. B. Frank; Pleospora bjoerlingii Byford)

Powdery mildew

Erysiphe polygoni DC.

Ramularia leaf spot

Ramularia beticola Fautrey & Lambotte

Rhizoctonia foliar blight

Rhizoctonia solani J. G. Kühn

       (syn. Thanatephorus cucumeris (A. B. Frank) Donk)

Root Diseases

Aphanomyces root rot

 Aphanomyces cochlioides Drechsler

Charcoal rot

Macrophomina phaseolina (Tassi) Goid.

       (syn. Macrophoma phaseoli Maubl.)

Dry rot canker

Binucleate Rhizoctonia spp.

Fusarium root rot

Fusarium oxysporum f. sp. radicis-betae Harv. & Rush

Fusarium yellows

Fusarium oxysporum f. sp. betae (D. Stewart) W. C. Snyder & H. N. Hansen

Phoma root rot

Neocamarosporium betae (Berl.) Ariyawansa

       (syns. Phoma betae A. B. Frank; Pleospora bjoerlingii Byford)

Phytophthora root rot

Phytophthora cryptogea Pethybr. & Laff.

Phytophthora drechsleri Tucker

Pythium root rot

Globisporangium ultimum (Trow) Uzuhashi, Tojo & Kakish.

       (syn. Pythium ultimum Trow)

Pythium aphanidermatum (Edson) Fitzp.

Pythium deliense Meurs

Phymatotrichopsis root rot (Cotton root rot)

Phymatotrichopsis omnivora (Shear) Hennebert

       (syn. Phymatotrichum omnivorum (Shear) Duggar)

Rhizoctonia root and crown rot

Rhizoctonia solani J. G. Kühn

       (syn. Thanatephorus cucumeris (A. B. Frank) Donk)

Rhizopus root rot

Rhizopus arrhizus A. Fisch.

       (syn. Rhizopus oryzae Went & Prins. Geerl.)

Rhizopus stolonifera (Ehrenb.:Fr.) Vuill.

Seedling diseases: Damping-off, black leg, black root and seedling

Aphanomyces cochlioides Drechsler

Globisporangium ultimum (Trow) Uzuhashi, Tojo & Kakish.

       (syn. Pythium ultimum Trow)

Neocamarosporium betae (Berl.) Ariyawansa

       (syns. Phoma betae A. B. Frank; Pleospora bjoerlingii Byford)

Pythium aphanidermatum (Edson) Fitzp.

Rhizoctonia solani J. G. Kühn

       (syn. Thanatephorus cucumeris (A. B. Frank) Donk)

Southern blight (Sclerotium root rot)

Athelia rolfsii (Curzi) C. C. Tu & Kimbr.

       (syn. Sclerotium rolfsii Sacc.)

Verticillium wilt

Verticillium albo-atrum Reinke & Berthold

Verticillium dahliae Kleb.

Violet root rot

Helicobasidium purpureum (Tul.) Pat.

       (syn. Rhizoctonia crocorum (Pers.:Fr.) DC.)

NEMATODES, PARASITIC

Beet cyst nematode

Heterodera schachtii Schmidt

Clover cyst nematode

Heterodera trifolii Goffart

False root-knot nematode

Nacobbus aberrans (Thorne & Schuster) Sher

Lesion nematodes

Pratylenchus spp.

Needle nematodes

Longidorus spp.

Potato rot nematode

Ditylenchus destructor Thorne

Root-knot nematode

Meloidogyne spp.

Stem and bulb nematode

Ditylenchus dipsaci (J. G. Kühn) Filipjev

Stubby-root nematodes

Paratrichodorus spp.

Trichodorus spp.

VIRUS AND VIRUSLIKE-ENTITY DISEASES

Beet chlorosis

Genus Polerovirus, Beet chlorosis virus (BChV)

Beet curly top

Genus Curtovirus, Beet curly-top virus (BCTV)

Beet leaf curl

Genus Nucleorhabdovirus, Beet leaf curl virus (BLCV)

Beet mild yellowing

Genus Polerovirus, Beet mild yellowing virus (BMYV)

Beet mosaic

Genus Potyvirus, Beet mosaic virus (BtMV)

Beet savoy

Unknown pathogen; thought to be similar to Beet leaf curl virus (BLCV) or a rickettsia-like organism similar to the pathogen of beet latent rosette

Beet soilborne

Genus Pomovirus, Beet soil-borne virus (BSBV)

Genus Pomovirus, Beet virus Q (BVQ)

Beet soilborne mosaic

Genus Benyvirus, Beet soilborne mosaic virus (BSBMV)

Beet western yellows

Genus Polerovirus, Beet western yellows virus (BWYV)

Beet yellow net

Beet western yellows virus and another unidentified component

Beet yellow stunt

Genus Closterovirus, Beet yellow stunt (BYSV)

Beet yellow vein

Unidentified pathogen

Beet yellows

Genus Closterovirus, Beet yellows virus (BYV)

Cucumber mosaic

Genus Cucumovirus, Cucumber mosaic virus (CMV)

Lettuce infectious yellows

Genus Crinivirus, Lettuce infectious yellows virus (LIYV)