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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.