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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.