Diseases of Sweetpotato**
(Ipomoea batatas (L.) Lam.)

C. A. Clark, C. W. Averre, P. D. Dukes, J. W. Moyer, G. L. Philley, J. B. Ristaino and C. Stevens, collators (last update 4/8/93)

BACTERIAL DISEASES

Bacterial stem and root rot: Erwinia chrysanthemi Burkholder et al.
Bacterial wilt*: Pseudomonas solanacearum (Smith) Smith
Crown gall: Agrobacterium tumefaciens (Smith & Townsend) Conn

FUNGAL DISEASES

Alternaria leaf spot and stem blight: Alternaria spp.
Alternaria storage rot: Alternaria spp.
Black rot: Ceratocystis fimbriata Ellis & Halst.; (anamorph: Chalara sp.)
Blue mold rot: Penicillium spp.
Cercospora leaf spot: Cercospora sp.; C. ipomoeae G. Wint.; = C. bataticola Ciferri & Bruner
Charcoal rot: Macrophomina phaseolina (Tassi) Goidanich
Chlorotic leaf distortion: Fusarium lateritium Nees:Fr.; (teleomorph: Gibberella baccata (Wallr.) Sacc.)
Circular spot: Sclerotium rolfsii Sacc.; (teleomorph: Athelia rolfsii (Curzi) Tu & Kimbrough)
Dry rot: Diaporthe phaseolorum (Cooke & Ellis) Sacc.; = D. batatatis Harter & E.C. Field; (anamorph: Phomopsis phaseoli (Desmaz.) Sacc.)
End rot: Fusarium spp.; F. solani (Mart.) Sacc.; (teleomorph: Nectria haematococca Berk. & Broome)
Foot rot: Plenodomas destruens Harter
Fusarium root rot and stem canker: Fusarium solani (Mart.) Sacc.
Fusarium wilt (stem rot): Fusarium oxysporum Schlechtend.:Fr. f. sp. batatas (Wollenweb.) W.C. Snyder & H.N. Hans.
Gray mold rot: Botrytis cinerea Pers.:Fr.; (teleomorph: Botryotinia fuckeliana (de Bary) Whetzel)
Java black rot: Lasiodiplodia theobromae (Pat.) Griffon & Maubl.; = Diplodia gossypina Cooke
Leaf mold: Choanephora cucurbitarum (Berk. & Ravenel) Thaxt.
Mottle necrosis: Pythium spp.; P. scleroteichum Drechs.; P. ultimum Trow; Phytophthora spp.
Phyllosticta leaf blight: Phomopsis ipomeae-batatas Punithalingam; = Phyllosticta batatas (Thuem.) Cooke
Phymatotrichum root rot (cotton root rot): Phymatotrichopsis omnivora (Duggar) Hennebert; = Phymatotrichum omnivorum Duggar
Pink root: Phoma terrestris E.M. Hans.; = Pyrenochaeta terrestris (E.M. Hans.) Gorenz et al.
Punky rot: Trichoderma spp.; T. koningii Oudem.
Rhizoctonia stem canker (sprout rot): Rhizoctonia solani Kühn; (teleomorph: Thanatephorus cucumeris (A.B. Frank) Donk)
Rhizopus soft rot: Rhizopus spp.; R. stolonifer (Ehrenb.:Fr.) Vuill.
Rootlet rot: Fusarium solani (Mart.) Sacc.; Pythium spp.; P. ultimum Trow; Rhizoctonia solani Kühn; Streptomyces ipomoeae (Person and Martin) Waksman &
Henrici
Rust, red: Coleosporium ipomoeae (Schwein.) Burrill
Rust, white: Albugo ipomoeae-panduratae (Schwein.) Swingle
Scab, leaf and stem*: Sphaceloma batatas Sawada; (teleomorph: Elsinoe batatas Viegas & Jenk.)
Southern blight (sclerotial blight): Sclerotium rolfsii Sacc.
Scurf: Monilochaetes infuscans Halst. ex Harter
Septoria leaf spot: Septoria bataticola Taubenhaus
Storage rot: Epicoccum spp.; Fusarium solani (Mart.) Sacc.; Mucor racemosus Fresen.; Sclerotinia spp.
Surface rot: Fusariumoxysporum Schlechtend.:Fr.; F. solani (Mart.) Sacc.
Violet root rot*: Helicobasidium mompa Tanaka

MISCELLANEOUS DISEASES OR DISORDERS

False broomrape: Uncharacterized
Streptomyces soil rot (pox): Streptomyces ipomoeae (Person and Martin) Waksman & Henrici

NEMATODES, PARASITIC

Brown ring of roots (bulb and stem nematode): Ditylenchus dipsaci (Kühn) Filipjev; D. destructor Thorne
Burrowing: Radopholus similis (Cobb) Thorne
Dagger: Xiphinema spp.; X. americanum Cobb
Lesion: Pratylenchus brachyurus (Godfrey) Filipjev &
Schuurmans-Stekhoven; P. coffeae (Zimmerman) Goodey
Pin: Paratylenchus spp.
Reniform: Rotylenchulus reniformis Linford & Oliveira
Root-knot: Meloidogyne spp.; M. arenaria (Neal) Chitwood; M. hapla Chitwood; M. incognita (Kofoid & White) Chitwood; M. javanica (Treub) Chitwood
Spiral: Helicotylenchus spp.
Sting: Belonolaimus longicaudatus Rau
Stubby-root: Paratrichodorus spp.; P. minor (Colbran) Siddiqi
Stunt: Tylenchorhynchus spp.

VIRUS AND VIRUSLIKE DISEASES

(Also a mycoplasmalike organism [MLO])

Feathery mottle: Sweet potato** feathery mottle virus (SPFMV)
Internal cork: Internal cork strain of sweet potato feathery mottlevirus (SPFMV-IC)
Latent virus*: Sweet potato** latent virus (SPLV)
Little leaf (proliferation disease): MLO
Mild mottle*: Sweet potato** mild mottle virus (SPMMV)
Russet crack: Russet crack strain of sweet potato feathery mottlevirus (SPFMV-RC)
Sweet potato virus disease (SPVD)*: Sweet potato feathery mottlevirus and an uncharacterized whitefly-transmitted agent
Yellow dwarf: Sweet potato** yellow dwarf virus (SPYDV)

* Indicates the disease is not known to occur in North America.

**At the time these viruses were originally named, sweetpotato was spelled as two words and the original names have been retained. However, in accordance with a resolution adopted by the National Sweetpotato Collaborators, sweetpotato is now spelled as one word.

QUICK LINKS