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Diseases of Potato
(Solanum tuberosum L.)

D. P. Weingartner and W. J. Hooker, primary collators, updated by Walter R. Stevenson (last update 10/29/01) 

BACTERIAL DISEASES

Bacterial wilt = brown rot

Ralstonia solanacearum (Smith 1896) Yabuuchi et al. 1996

= Pseudomonas solanacearum (Smith 1896) Smith 1914

Blackleg and bacterial soft rot

Pectobacterium carotovorum subsp. atrosepticum (van Hall
    1902) Hauben et al. 1999

= Erwinia carotovora subsp. atroseptica (van Hall 1902)
    Dye 1969

Pectobacterium carotovorum subsp. carotovorum (Jones
    1901) Hauben et al. 1999

= E. carotovora subsp. carotovora (Jones 1901) Bergey et
    al. 1923

Pectobacterium chrysanthemi (Burkholder et al. 1953)
    Brenner et al. 1973 emend. Hauben et al. 1998

= E. chrysanthemi Burkholder et al. 1953

Pink eye

Pseudomonas fluorescens Migula 1895

Ring rot

Clavibacter michiganensis subsp. sepedonicus
    (Spieckermann and Kotthoff 1914) Davis et al. 1984

= Corynebacterium sepedonicum (Spieckermann and
    Kotthoff 1914) Skaptason and Burkholder 1942

Common scab

Streptomyces scabiei Lambert and Loria 1989

= S. scabies (Thaxter) Lambert & Loria

Streptomyces acidiscabies Lambert and Loria 1989

Streptomyces turgidiscabies Miyajima et al. 1998

FUNGAL DISEASES

Black dot

Colletotrichum coccodes (Wallr.) S. J. Hughes

= C. atramentarium (Berk. & Broome) Taubenhaus

Brown spot and Black pit

Alternaria alternata (Fries.) Keissler

= A. tenuis Ness.

Cercospora leaf blotch

Mycovellosiella concors (Casp.) Deighton

= Cercospora concors (Casp.) Sacc.

Cercospora solani Thiim

C. solani-tuberosi Thirumalachur*

Charcoal rot

Macrophomina phaseolina (Tassi) Goidanich

= M. phaseoli (Maubl.)

Sclerotium bataticola Taubenhaus

Choanephora blight

Choanephora cucurbitarum (Berk. & Rav.) Thaxter

Common rust

Puccinia pittieriana P. Henn.

Deforming rust

Aecidium cantensis Arthur

Early blight

Alternaria solani (E&M) Jones & Grout

Fusarium dry rot

Fusarium spp.

F. sambucinum

    Giberella pulicaris (Fr.:Fr.) Sacc. [teleomorph]

= Fusarium sulphureum Schlechtendahl

F. solani (Mart.) Sacc. var. coeruleum (Lib. ex Sacc.)
    C. Booth

Other Fusarium spp. include: F. avenaceum (Fr.) Sacc.

F. oxysporum Schlechtend.:Fr.

F. culmorum (Wm. G. Sm.) Sacc.

Less common Fusarium spp. include: F. acuminatum
    Ellis & Everh.

F. equiseti (Corda) Sacc.

F. crookwellense

Fusarium wilt

Fusarium spp.

F. avenaceum (Fr.) Sacc.

F. oxysporum Schlechtend.:Fr.

F. solani f. sp. eumartii (Carp.) Snyd and Hans.

Gangrene

Phoma solanicola f. foveata (Foister) Malcolmson

P. foveata Foister

= P. exigua var. foveata (Foister) Boerema

= P. exigua Desm. f. sp. foveata (Foister) Malcolmson &
    Gray

P. exigua Desm. var. exigua (more ubiquitous but weaker
    pathogen)

Gray mold

Botrytis cinerea Pers.:Fr.

    Botryotinia fuckeliana (de Bary) Whetzel [teleomorph]

Late blight

Phytophthora infestans (Mont.) de Bary

Leak

Pythium spp.

Pythium ultimum var. ultimum Trow.

= P. debaryanum R. Hesse

Pythium aphanidermatum (Edson) Fitz.

P. deliense Meurs

Phoma leaf spot*

Phoma andigena var. andina Turkensteen

Pink rot

Phytophthora spp.

P. cryptogea Pethybr. & Lafferty

P. drechsleri Tucker

P. erythroseptica Pethybr.

P. megasperma Drechsler

P. nicotianae van Breda de Haan var. parasitica (Dastur)
    Waterhouse

Pleospora herbarum

Pleospora herbarum (Pers. ex Fr.) Rabenh.

    Stemphylium herbarum E. Simmons [anamorph]

Powdery mildew

Erysiphe cichoracearum DC. ex Merat

Powdery scab

Spongospora subterranea (Wallr.) Lagerh. f. sp. subterranea Tomlinson

Rhizoctonia canker and black scurf

Rhizoctonia solani Kühn

    Thanatephorus cucumeris (A.B. Frank) Donk
    [teleomorph]

Rosellinia black rot*

Rosellinia sp.

    Dematophora sp. [anamorph]

Septoria leaf spot

Septoria lycopersici Speg. var. malagutii Ciccarone & Boerema

Silver scurf

Helminthosporium solani Dur. & Mont.

Skin spot

Polyscytalum pustulans (Owen & Wakef.) Ellis

Stem rot (southern blight)

Sclerotium rolfsii Sacc.

    Athelia rolfsii (Curzi) Tu & Kimbrough [teleomorph]

Thecaphora smut

Angiosorus solani (Barrus) Thirum. & O’Brien

= Thecaphora solani Barrus

Ulocladium blight

Ulocladium atrum Preuss

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

V. dahliae Kleb.

Wart

Synchytrium endobioticum (Schilb.) Perc.

White mold

Sclerotinia sclerotiorum (Lib.) de Bary

NEMATODES, PARASITIC

Potato cyst, golden nematode

Globodera rostochiensis (Wollenweber) Mulvey & Stone

G. pallida (Stone) Mulvey & Stone

Lesion nematode

Pratylenchus spp.

P. brachyurus (Godfrey) Filipjev & Schuurmans-Stekhoven

P. penetrans (Cobb) Filipjev & Schuurmans-Stekhoven

Other species include: P. scribneri Steiner

P. neglectus (Rensch,) Filipjev and Schuurmans Stekhoven

P. thornei Sher and Allen

P. crenatus Loof

P. andinus Lordello, Zamith & Boock

P. vulnus Allen and Jensen

P. coffeae Goodey

Potato rot nematode

Ditylenchus destructor Thorne

Root knot nematode

Meloidogyne spp.

M. hapla Chitwood

M. incognita (Kofoid & White) Chitwood

M. javanica (Treub) Chitwood

M. chitwoodi Golden et al.

Sting nematode

Belonolaimus longicaudatus Rau

Stubby-root nematode

Paratrichodorus spp.

Trichodorus spp.

VIRAL and VIROID DISEASES

Alfalfa mosaic virus

genus Alfamovirus, Alfalfa mosaic virus (AMV)

Andean potato latent virus*

genus Tymovirus, Andean potato latent virus (APLV)

Andean potato mottle virus*

genus Comovirus, Andean potato mottle virus (APMV)

Arracacha virus B - Oca strain

genus Nepovirus, Arracacha virus B Oca strain (AVB-O)

Beet curly top virus

genus Curtovirus, Beet curly top virus (BCTV)

Cucumber mosaic virus

genus Cucumovirus, Cucumber mosaic virus (CMV)

Eggplant mottle dwarf virus

genus Rhabdovirus, Eggplant mottle dwarf virus (EMDV)

Potato aucuba mosaic virus

genus Potexvirus, Potato aucuba mosaic virus (PAMV)

Potato black ringspot virus

genus Nepovirus, Potato black ringspot virus (PBRSV)

Potato deforming mosaic virus

genus Geminiviridae Potato deforming mosaic virus subgroup III, (PDMV)

Potato latent virus

genus Carlavirus, Potato latent virus (PLV)

Potato leafroll virus

genus Luteovirus, Potato leafroll virus (PLRV)

Potato mop-top virus

genus Furovirus, Potato mop-top virus (PMTV)

Potato rugose mosaic

genus Potyvirus, Potato virus Y (PVY, strains O, N and C)

Potato stem mottle (spraing of tubers)

genus Tobravirus, Tobacco rattle virus (TRV)

Potato spindle tuber

Potato spindle tuber viroid (PSTV)

Potato yellow dwarf virus

genus Nucleorhabdovirus, Potato yellow dwarf virus (PYDV)

Potato yellow mosaic virus

genus Geminiviridae, Potato yellow mosaic virus (PYMV); subgroup III

Potato yellow vein virus

Potato yellow vein virus (PYVV)

Potato yellowing virus

genus Alfamovirus, Potato yellowing virus (PYV)

Potato virus A

genus Potyvirus, Potato virus A (PVA)

Potato virus M

genus Carlavirus, Potato virus M (PVM)

Potato virus S

genus Carlavirus, Potato virus S (PVS)

Potato virus T*

genus Trichovirus, Potato virus T*

Potato virus U

genus Nepovirus Potato virus U (PVU)

Potato virus V

genus Potyvirus, Potato virus V (PVV)

Potato virus X

genus Potexvirus, Potato virus X (PVX)

Potato virus Y

genus Potyvirus, Potato virus Y (PVY)

Solanum apical leaf curling virus

Geminiviridae, Solanum apical leaf curling virus (SALCV) subgroup III

Sowbane mosaic virus

genus Sobemovirus, Sowbane mosaic virus (SoMV)

Tobacco mosaic virus

genus Tobamovirus, Tobacco mosaic virus (TMV)

Tobacco necrosis virus

genus Necrovirus, Tobacco necrosis virus (TNV)

Tobacco rattle virus

genus Tobravirus, Tobacco rattle virus (TRV)

Tobacco streak virus

genus Ilarvirus, Tobacco streak virus (TSV)

Tomato black ring virus

genus Nepovirus, Tomato black ring virus (ToBRV)

Tomato mosaic virus

genus Tobamovirus, Tomato mosaic virus (ToMV)

Tomato spotted wilt virus

genus Tospovirus, Tomato spotted wilt virus (TSWV)

Tomato yellow mosaic virus

genus Geminiviridae, Tomato yellow mosaic virus (ToYMV) subgroup III

Wild potato mosaic virus

genus Potyvirus, Wild potato mosaic virus (WPMV)

PHYTOPLASMAL DISEASES

Aster yellows

Aster yellows group of phytoplasmas

Witches'-broom

Witches’ broom phytoplasma

MISCELLANEOUS DISEASES and DISORDERS

Aerial tubers

Phytoplasma infection or anything that constricts the stem, including but not limited to Rhizoctonia canker, heat necrosis, chemical injury, mechanical injury, wind injury

Air polution injury

Photochemical oxidants (primarily ozone), sulfur oxides

Black heart

Oxygen deficiency of internal tuber tissue

Blackspot bruise

Bruising, pressure contact

Elephant hide

Roughening of tuber skin due to physiological or environmental causes

Hollow heart

Excessively rapid tuber enlargement

Internal brown spot = heat necrosis

Oxygen deficiency of tuber accompanying high soil temperature

Jelly end rot

Carbohydrate translocation due to second growth

Physiological leaf roll

Response to adverse environment

Psyllid yellows

Toxic saliva of the potato (tomato) psyllid, Paratrioza cockerelli (Sulc)

Shatter bruise

Mechanical damage to tuber

Skinning

Mechanical damage to tuber

Stem-end browning

Exact cause(s) unknown, chemical injury, viruses or other pathogens.

 

*Indicates the disease isn't known to occur naturally in North America.