Diseases of Rapeseed = Canola
(B. napus L. and Brassica rapa L.
(= B. campestris L.))

P. D. Kharbanda, B. D. L. Fitt, R. M. Lange, J. S. West, A. H. Lamey, D. V. Phillips, primary collators (last update 3/8/01)

BACTERIAL DISEASES

Bacterial black rot

Xanthomonas campestris pv. campestris (Pammel 1895)

    Dowson 1939

=Xanthomonas campestris pv. raphani

=Xanthomonas campestris pv. aberrans

Bacterial leaf spot

Xanthomonas campestris pv. armoraciae (McCulloch 1929) Dye 1978

Bacterial pod rot*

Pseudomonas syringae pv. maculicola (McCulloch 1911) Young, Dye and Wilkie 1978)

(Canada, UK)

Bacterial soft rot

Erwinia carotovora (Jones 1901) Bergey et al. 1923

Pseudomonas marginalis pv. marginalis (Brown 1918)

    Stevens 1925

Scab

Streptomyces spp.

Streptomyces scabiei corrig. (ex Thaxter 1891) Lambert
    and Loria 1989

= Streptomyces scabies (Thaxter 1891) Waksman and
    Henrici 1948

Crown gall

Agrobacterium tumefaciens (Smith and Townsend 1907) Conn 1942

FUNGAL DISEASES

Alternaria black spot = Dark pod spot (UK)

Alternaria brassicae (Berk.) Sacc.

A. brassicicola (Schwein.) Wiltshire

A. japonica H. Yoshii

= A. raphani Groves and Skolko

Anthracnose

Colletotrichum gloeosporioides (Penz.) Penz. and Sacc. in Penz.

    Glomerella cingulata (Stoneman) Spauld. and
    H. Schrenk [teleomorph]

C. higginsianum Sacc. in Higgins

Black leg = stem canker (UK)

Leptosphaeria maculans (Desmaz.) Ces. and De Not

    Phoma lingam (Tode:Fr.) Desmaz. [anamorph]

Black mold rot

Rhizopus stolonifer (Ehrenb.:Fr.) Vuill.

Black root

Aphanomyces raphani Kendrick

Brown girdling root rot*

Rhizoctonia solani Kühn (Canada)

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

Cercospora leaf spot

Cercospora brassicicola Henn.

Clubroot

Plasmodiophora brassicae Woronin

Downy mildew

Peronospora parasitica (Pers.:Fr.)Fr.

Fusarium wilt

Fusarium oxysporum Schlechtend.:Fr. f. sp. conglutinans (Wollenweb.) W.C. Snyder and H.N. Hans.

Gray mold

Botrytis cinerea Pers.:Fr.

    Botryotinia fuckeliana (de Bary) Whetzel [teleomorph]

Head rot

Rhizoctonia solani Kühn

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

Leaf spot*

Alternaria alternata (Fr.:Fr.) Keissl. (Canada)

Ascochyta spp. (former USSR)

Light leaf spot

Pyrenopeziza brassicae Sutton and Rawlinson in Rawlinson et al. (1978).

    Cylindrosporium concentricum Grev. [anamorph]

Pod rot*

Alternaria alternata (Fr.:Fr.) Keissl. (Canada)

Cladosporium sp.

Powdery mildew

Erysiphe polygoni DC.

E. cruciferarum Opiz ex Junell.

Ring spot

Mycosphaerella brassicicola (Duby) Lindau in Engl. and Prantl

    Asteromella brassica (Chev.) Boerema and Van
    Kesteren [anamorph]

Root rot

Alternaria alternata (Fr.:Fr.)Keissl.

Fusarium spp.

Macrophomina phaseolina (Tassi) Goidanich

Phymatotrichopsis omnivora (Duggar) Hennebert

Phytophthora megasperma Drechs.

Pythium debaryanum Auct. non R. Hesse

P. irregulare Buisman

Rhizoctonia solani Kühn

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

Sclerotium rolfsii Sacc.

    Athelia rolfsii (Curzi) Tu and Kimbrough [teleomorph]

Sclerotinia stem rot

Sclerotinia sclerotiorum (Lib.) de Bary

Seed rot, damping-off

Alternaria spp.

Fusarium spp.

Gliocladium roseum (Link) Bainier

    Nectria ochroleuca (Schwein.) Berk [teleomorph]

Pythium spp.

Rhizoctonia solani Kühn

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

Rhizopus stolonifer (Ehrenb.:Fr) Vuill.

Sclerotium rolfsii Sacc.

Root gall smut*

Urocystis brassicae Mundkur (China, India)

Southern blight (leaf, root and seed rot)

Sclerotium rolfsii Sacc.

Verticillium wilt*

Verticillium longisporum (comb. Nov. Karapappa et al.)

(Europe)

White blight*

Rhizoctonia solani Kühn (India)

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

White leaf spot = grey stem (Canada)

Pseudocercosporella capsellae (Ellis and Everh.) Deighton

= Cercosporella brassicae (Faitrey and Roum.) Höhn.

    Mycosphaerella capsellae (Inman and Sivansen)
    [teleomorph]

White rust = staghead

Albugo candida (Pers.) Kunze

= A. cruciferarum (DC.) S.F. Gray

(Peronospora sp. commonly present in staghead phase)

Yellows

Fusarium oxysporum Schlechtend.:Fr.

NEMATODES, PARASITIC

Cyst nematode

Heterodera cruciferae Franklin

H. schachtii Schmidt

Lesion nematode

Pratylenchus spp.

P. pratensis (de Man) Filipjev

Root-knot nematode

Meloidogyne spp.

VIRAL DISEASES

Crinkle*

genus Carmovirus, Turnip crinkle virus (TCV) (Yugoslavia)

Mosaic

genus Caulimovirus, Cauliflower mosaic virus (CaMV)

genus Cucumovirus, Cucumber mosaic virus* (CMV)
    (Hungary)

genus Comovirus, Radish mosaic virus (RaMV)

genus Potyvirus, Turnip mosaic virus (TuMV)

Yellows

genus Luteovirus, Beet western yellows virus (BWYV)

genus Cytorhabdovirus, Broccoli necrotic yellows virus*
    (BNYV)

PHYTOPLASMAL DISEASES

Aster yellows and phyllody

Aster yellows phytoplasma

MISCELLANEOUS DISEASES and DISORDERS

Autogenic necrosis

Genetic disorder

Black speck

Physiological

Sulfur deficiency

Sulfur deficiency

Tipburn

Calcium deficiency

* Not known to occur naturally in the U.S.A.