Diseases of Rose
(Rosa spp.)

D.L. Gill and R. K. Horst, primary collators (last update 3/15/93)

BACTERIAL DISEASES

Bacterial leaf spot or blast

Pseudomonas syringae pv. mors-prunorum (Wormald) Young et al.

Crown gall

Agrobacterium tumefaciens (Smith & Townsend) Conn

Hairy root

Agrobacterium rhizogenes (Riker et al.) Conn

FUNGAL DISEASES

Alternaria leaf spot

Alternaria alternata (Fr.:Fr.) Keissl.

A. brassicae (Berk.) Sacc.

A. brassicicola (Schwein.) Wiltshire

Black mold

Chalara thielavioides (Peyronel) Nag Raj & Kendrick

= Chalaropsis thielavioides Peyronel

Black spot

Diplocarpon rosae F.A. Wolf

(anamorph: Marssonina rosae (Lib.) Died.)

Botrytis blight (bud, twig, and flower; also cane canker)

Botrytis cinerea Pers.:Fr.

(teleomorph: Botryotinia fuckeliana (de Bary) Whetzel)

Brand canker

Coniothyrium wernsdorffiae Laubert

Brown canker

Cryptosporella umbrina (Jenk.) Jenk. & Wehmeyer

= Diaporthe umbrina Jenk.

Cane blight canker

Botryosphaeria dothidea (Moug.:Fr.) Ces. & De Not.

(anamorph: Fusicoccum aesculi Corda)

B. ribis Gross & Duggar

(anamorph: Fusicoccum sp.)

Discostroma corticola (Fuckel) I. Brockmann

(anamorph: Seimatosporium lichenicola (Corda) Shoemaker
   & E. Müller)

Cercospora leaf spot

Pseudocercospora puderi B.H. Davis ex Deighton

= Cercospora puderi B.H. Davis

Cercospora rosicola Pass.

(teleomorph: Mycosphaerella rosicola B.H. Davis ex
   Deighton)

Common stem canker

Diapleella coniothyrium (Fuckel) Barr

(anamorph: Coniothyrium fuckelii Sacc.)

Crown canker

Cylindrocladium scoparium Morg.

(teleomorph: Calonectria kyotensis Terashita)

Downy mildew

Peronospora sparsa Berk.

Fungal canker

Cryptosporium minimum Laubert

Nectria cinnabrarina (Tode:Fr.) Fr.

(anamorph: Tubercularia vulgaris Tode:Fr.)

Diaporthe eres Nitschke

(anamorph: Phomopsis oblonga (Desmaz.) Traverso)

Diplodia sp.

Graft canker

Coniothyrium rosarum Cooke & Harkn.

Powdery mildew

Sphaerotheca pannosa (Wallr.:Fr.) Lév. var. rosae Woronichin

Rust

Phragmidium mucronatum (Pers.:Pers.) Schlechtend.

P. rosae-pimpinellifoliae Dietel plus seven other Phragmidium spp.

Septoria leaf spot

Septoria rosae Desmaz.

(teleomorph: Sphaerulina rehmiana Jaap)

Spot anthracnose

Elsinoe rosarum Jenk. & Bitancourt

(anamorph: Sphaceloma rosarum (Pass.) Jenk.)

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

V. dahliae Kleb.

MISCELLANEOUS DISEASES OR DISORDERS

Rose flower proliferation

Undetermined

Rose spring dwarf

Undetermined

Rose wilt

Undetermined

NEMATODES, PARASITIC

Dagger

Xiphenema spp.

X. diversicaudatum (Micoletzky) Thorne

Lesion

Pratylenchus penetrans (Cobb) Filipjev &
   Schuurmans-Stekhoven

P. vulnus Allen & Jensen

Ring

Criconemella axesta (Fassuliostis & Williams) Luc & Raski

Root-knot

Meloidogyne hapla Chitwood

Spiral

Helicotylenchus nannus Steiner

Rotylenchus spp.

Stunt

Tylenchorhynchus spp.

VIRUS AND VIRUSLIKE DISEASES

(And graft-transmissible pathogens [GTP])

Rose flower break

Undetermined, GTP

Rose leaf curl

Virus suspected

Rose mosaic

Rose mosaic virus (RMV), (GTP)

Rose ring pattern

Virus suspected (GTP)

Rose rosette

Virus suspected, mite transmitted

Rose streak

Rose streak virus (RSV), (GTP)

Strawberry latent

Strawberry latent ringspot virus (SLRV), nematode transmitted