Diseases of Soybeans
(Glycine max (L.) Merrill)

Sung M. Lim and D. W. Chamberlain, primary collators, updated by S. M. Lim (last update 8/03/01)

BACTERIAL DISEASES

Bacterial blight

Pseudomonas syringae pv. glycinea (Coerper 1919) Young, Dye & Wilkie 1978

Bacterial crinkle-leaf

Pseudomonas syringae subsp. syringae van Hall 1902

Bacterial pustules

Xanthomonas axonopodis pv. glycines (Nakano 1919)
    Vauterin, Hoste, Kersters & Swings 1995

= Xanthomonas campestris pv. glycines (Nakano 1919)
    Dye 1978b

Bacterial tan spot

Curtobacterium flaccumfaciens pv. flaccumfaciens

    (Hedges 1922) Collins & Jones 1983

= Corynebacterium flaccumfaciens pv. flaccumfaciens

    (Hedges 1922 Dowson 1942

Bacterial wilt

Curtobacterium flaccumfaciens pv. flaccumfaciens

    (Hedges 1922) Collins & Jones 1983

Ralstonia solanacearum (Smith 1896) Yabuuchi et al. 1996

=Pseudomonas solanacearum (Smith 1896) Smith 1914

Wildfire

Pseudomonas syringae pv. tabaci (Wolf & Foster 1917) Young, Dye & Wilkie 1978

FUNGAL DISEASES

Alternaria leaf spot

Alternaria spp.

Anthracnose

Colletotrichum truncatum (Schwein.) Andrus &
    W.D. Moore

C. dematium (Pers.) Grove f. truncatum (Schwein.) Andrus

    & W. D. Moore

Glomerella glycines F. Lehm. & F.A. Wolf

    Colletotrichum destructivum O'Gara [anamorph]

Black leaf blight*

Arkoola nigra J. Walker & G. Stovold

Black root rot

Thielaviopsis basicola (Berk. & Broome) Ferraris

    Chalara elegans Naj Raj & Kendrick [synanamorph]

Brown spot

Septoria glycines Hemmi

    Mycosphaerella usoenskajae Mashk & Tomil
    [teleomorph]

Brown stem rot

Phialophora gregata (Allington & D.W. Chamberlain)
    W. Gams

= Cephalosporium gregatum Allington & D.W. Chamberlain

Charcoal rot

Macrophomina phaseolina (Tassi) Goidanich

Choanephora leaf blight

Choanephora infundibulifera (Currey) Sacc.

C. trispora (Thaxter)

Damping-off

Rhizoctonia solani Kühn

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

Pythium aphanidermatum (Edison) Fitzp.

P. debaryanum Auct. non R. Hesse

P. irregulare Buisman

P. myriotylum Drechs.

P. ultimum Trow

Downy mildew

Peronospora manshurica (Naumov) Syd. In Gaum.

Drechslera blight

Drechslera glycines Narayanasamy & Durairj

Frogeye leaf spot

Cercospora sojina K. Hara

Fusarium root rot

Fusarium spp.

Leptosphaerulina leaf spot

Leptosphaerulina trifolii (Rostr.) Petr.

Mycoleptodiscus root rot

Mycoleptodiscus terrestris (Gerdemann) Ostazeski

Neocosmospora stem rot

Neocosmospora vasinfecta E.F. Sm.

    Acremonium sp. [anamorph]

Phomopsis seed decay

Phomopsis spp.

Phytophthora root and stem rot

Phytophthora sojae Kaufmann & Gerdemann

Phyllosticta leaf spot

Phyllosticta sojicola C. Massal

Phymatotrichum root rot = cotton root rot

Phymatotrichopsis omnivora (Duggar) Hennebert

= Phymatotrichum omnivorum Duggar

Pod and stem blight

Diaporthe phaseolorum (Cke. & Ell.) Sacc. var. sojae (Lehman) Wehm.

    Phomopsis sojae Lehman [anamorph]

Powdery mildew

Microsphaera diffusa Cooke & Peck

Purple seed stain

Cercospora kikuchii (Mastsumoto & Tomoyasu) M.W. Gardner

Pyrenochaeta leaf spot*

Pyrenochaeta glycines Stewart

Pythium rot

Pythium aphanidermatum (Edison) Fitzp.

P. debaryanum Auct. non R. Hesse

P. irregulare Buisman

P. myriotylum Drechs.

P. ultimum Trow

Red crown rot

Cylindrocladium crotalariae (C.A. Loos) D.K. Bell & Sobers

    Calonectria crotalariae (C.A. Loos) D.K. Bell & Sobers

    [teleomorph]

Red leaf blotch = Dactuliophora leaf spot*

Dactuliochaeta glycines (R. B. Stewart) Hartman & Sinclair

= Pyrenochaeta glycines (R. B. Stewart)

    Dactuliophora glycines Leaky [synanamorph]

Rhizoctonia aerial blight

Rhizoctonia solani Kühn

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

Rhizoctonia root and stem rot

Rhizoctonia solani Kühn

Rust*

Phakopsora pachyrhizi Syd.

Scab*

Spaceloma glycines Kurata & Kuribayashi

Sclerotinia stem rot

Sclerotinia sclerotiorum (Lib.) de Bary

Southern blight (damping-off and stem rot) = Sclerotium blight

Sclerotium rolfsii Sacc.

    Athelia rolfsii (Curzi) Tu & Kimbrough [teleomorph]

Stem canker

Diaporthe phaseolorum (Cooke & Ellis) Sacc.

D. phaseolorum (Cooke & Ellis) Sacc. var. caulivora Athow & Caldwell

    Phomopsis phaseoli (Desmaz) Sacc [anamorph]

Stemphylium leaf blight*

Stemphylium botryosum Wallr.

    Pleospora tarda (E. Simmons) [teleomorph]

Sudden death syndrome

Fusarium solani (Mart.) Sacc. f. sp. glycines

Target spot

Corynespora cassiicola (Berk. & M.A. Curtis) C.T. Wei

NEMATODES, PARASITIC

Lance nematode

Hoplolaimus columbus Sher

H. galeatus (Cobb) Sher

H. magnistylus Robbins

Lesion nematode

Pratylenchus spp.

Pin nematode

Paratylenchus projectus Jenkins

P. tenuicaudatus Wu

Reniform nematode

Rotylenchulus reniformis Linford & Oliveira

Ring nematode

Criconemella ornata (Raski) Luc & Raski

Root-knot nematode

Meloidogyne arenaria (Neal) Chitwood

M. hapla Chitwood

M. incognita (Kofoid & White) Chitwood

M. javanica (Treub) Chitwood

Sheath nematode

Hemicycliophora spp.

Soybean cyst nematode

Heterodera glycines Ichinohe

Spiral nematode

Helicotylenchus spp.

Sting nematode

Belonolainus gracilis Steiner

B. longicaudatus Rau

Stubby root nematode

Paratrichodorus minor (Colbran) Siddiqi

Stunt nematode

Quinisulcius acutus (Allen) Siddiqi

Tylenchorhynchus spp.

VIRAL DISEASES

Alfalfa mosaic

genus Alfamovirus, Alfalfa mosaic virus (AMV)

Bean pod mottle

genus Comovirus, Bean pod mottle virus (BPMV)

Bean yellow mosaic

genus Potyvirus, Bean yellow mosaic virus (BYMV)

Brazilian bud blight

genus Ilarvirus, Tobacco streak virus (TSV)

Cowpea chlorotic mottle

genus Bromovirus, Cowpea chlorotic mottle virus (CCMV)

Mung bean yellow mosaic*

genus Begomovirus, Mung bean yellow mosaic virus (MYMV)

Peanut mottle

genus Potyvirus, Peanut mottle virus (PeMoV)

Peanut stripe

genus Potyvirus, Peanut stripe virus (PStV)

Peanut stunt

genus Cucumovirus, Peanut stunt virus (PSV)

Soybean chlorotic mottle*

genus Caulimovirus, Soybean chlorotic mottle virus (SbCMV)

Soybean crinkle leaf*

genus Begomovirus, Soybean crinkle leaf virus (SCLV)

Soybean dwarf*

genus Luteovirus, Soybean dwarf virus (SbDV)

Soybean mosaic

genus Potyvirus, Soybean mosaic virus (SMV)

Soybean severe stunt

genus Nepovirus, Soybean severe stunt virus (SSSV)

Tobacco ringspot = bud blight

genus Nepovirus, Tobacco ringspot virus (TRSV)

MISCELLANEOUS DISEASES and DISORDERS

Yeast spot

Nematospora coryli Peglion

*Not known to occur naturally in the United States of America.