Diseases of Crucifers
(Brassica and Raphanus spp.)

Paul H. Williams, primary collator (last update 3/8/93)

BACTERIAL DISEASES

Bacterial leaf spot

Pseudomonas syringae pv. maculicola (McCulloch) Young et al.

Bacterial soft rot Erwinia

Erwinia carotovora (Jones) Bergey et al.

Bacterial soft rot Pseudomonas

Pseudomonas marginalis pv. marginalis (Brown) Stevens

Black rot

Xanthomonas campestris pv. campestris (Pammel) Dowson

Crown gall

Agrobacterium tumefaciens (Smith & Townsend) Conn

Xanthomonas leaf spot

Xanthomonas campestris pv. armoraciae (McCulloch) Dye

FUNGAL DISEASES

Alternaria diseases: black spot (leaf, stem, or pod spots)

Alternaria spp. (A. brassicae (Berk.) Sacc., A. brassicicola (Schwein.) Wiltshire, A. raphani Groves & Skolko)

Anthracnose

Colletotrichum higginsianum Sacc. in Higgins

Black leg and Phoma root rot

Leptosphaeria maculans (Desmaz.) Ces. & De Not.

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

Black mold rot

Rhizopus stolonifer (Ehrenb.:Fr.) Vuill.

Black root (Aphanomyces)

Aphanomyces raphani Kendrick

Bottom rot, damping-off, headrot, seedling root rot, wire stem, and basal stem rot

Rhizoctonia solani Kühn

(teleomorph: Thanatephorus cucumeris (A.B. Frank) Donk)

Cercospora leaf spot

Cercospora brassicicola Henn.

Clubroot

Plasmodiophora brassicae Woronin

Damping-off

Fusarium spp.

Pythium spp.

Downy mildew, staghead

Peronospora parasitica (Pers.: Fr.) Fr.

Graymold

Botrytis cinerea Pers.:Fr.

(teleomorph: Botryotinia fuckeliana (de Bary) Whetzel)

Light leaf spot

Pyrenopeziza brassicae Sutton & Rawl

Phymatotrichum root rot (cotton root rot)

Phymatotrichopsis omnivora (Duggar) Hennebert

= Phymatotrichum omnivorum Duggar

Phytophthora root rot

Phytophthora megasperma Drechs.

Powdery mildew

Erysiphe polygoni DC.

Ring spot

Mycosphaerella brassicicola (Duby) Lindau in Engl. & Prantl (anamorph: Asteromella brassicae (Chev.) Boerema & Van
    Kesteren)

Sclerotinia stem rot and watery soft rot

Sclerotinia sclerotiorum (Lib.) de Bary

Southern blight

Sclerotium rolfsii Sacc.

(teleomorph: Athelia rolfsii (Curzi) Tu & Kimbrough)

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

V. dahliae Kleb.

White leaf spot and gray stem

Pseudocercosporella capsellae (Ellis & Everh.) Deighton

White rust and staghead

Albugo candida (Pers.) Kunze (Peronospora sp. commonly present in staghead phase)

Yellows

Fusarium oxysporum Schlechtend.:Fr.

MISCELLANEOUS DISEASES OR DISORDERS

Autogenic necrosis

Genetic disorder

Black speck

Physiological

Brown girdling root rot

Unidentified

Scab

Streptomyces spp.

S. scabies (Thaxter) Waksman & Henrici

NEMATODES, PARASITIC

Awl

Dolichodorus spp.

Cyst

Heterodera schachtii Schmidt

H. cruciferae Franklin

Lesion

Pratylenchus pratensis (de Man) Filipjev

Pin

Paratylenchus spp.

Root-knot

Meloidogyne spp.

Sting

Belonolaimus spp.

VIRUS DISEASES

Cauliflower mosaic

Cauliflower mosaic virus

Radish mosaic

Radish mosaic virus

Turnip mosaic

Turnip mosaic virus

Yellows

Beet western yellows virus