Rose Cultivar Resistance

Rose (Rosa spp.) — Cultivar Resistance

The fungal diseases rust, powdery mildew, and black spot are common in Pacific Northwest rose gardens. Cultivars in this table were grown and tested at the Portland, OR International Rose Test Garden; many also were grown at the Longview, WA Public Library Rose Garden. Growers report that many of these cultivars are no longer easily available from rose suppliers. Also, cultivars may react differently in other areas of the Pacific Northwest.

Roses found resistant in one location may be susceptible in another location due to the presence of different fungal strains. Also, resistant roses may become susceptible after a few years due to changes in the local fungal population. Editions of the PNW Plant Management Control Handbook before 1991 list resistant rose cultivars available in the 1970s.

Cultivar

Color

Rust

Powdery Mildew

Black Spot

Cultivar

Color

Rust

Powdery Mildew

Black Spot

Hybrid Teas

Grandiflora—continued

Blue Nile

M

R

M

M

Prominent

OR

R

M

M

Chicago Peace

PB

M

M

M

Queen Elizabeth

MP

M

M

M

Color Magic

PB

M

M

M

Shreveport

OB

M

M

M

Dainty Bess

LP

M

M

M

Tournament of Roses

MP

R

R

R

Double Delight

RB

M

M

M

Floribunda

Electron

DP

R

R

R

Bonica

MP

R

M

R

Folklore

OB

M

M

M

Cherish

MP

R

M

M

Fragrant Cloud

OR

R

M

M

Class Act

W

R

R

M

Granada

RB

M

S

M

Escapade

M

M

M

R

Headliner

PB

M

S

M

Europeana

DR

R

R

R

Heirloom

M

M

M

M

Eye Paint

RB

R

R

M

Helmut Schmidt

MY

R

M

R

French Lace

W

M

M

M

Honor

W

M

M

M

Iceberg

W

R

M

R

Irish Gold

MY

M

M

M

Impatient

OR

R

R

R

Just Joey

OB

R

R

R

Intrigue

M

R

M

M

Keepsake

PB

R

R

R

Little Darling

YB

M

M

M

Las Vegas

OB

R

R

R

Liverpool Echo

OB

R

R

R

Medallion

AB

M

M

M

Marina

OB

R

M

M

Mr. Lincoln

DR

M

M

M

Matangi

RB

R

R

R

New Day

MY

R

M

R

Orangeade

OR

M

M

R

Olympiad

MR

R

M

M

Play Girl

MP

R

R

R

Paradise

MB

M

M

M

Playboy

RB

R

R

R

Pascali

W

R

M

M

Redgold

YB

R

M

R

Peace

YB

M

M

M

Regensberg

PB

R

R

R

Peter Frankenfeld

DP

R

M

R

Sarabande

OR

R

R

R

Polarstern

W

R

M

R

Sexy Rexy

MP

R

R

R

Precious Platinum

MR

R

M

R

Shocking Blue

M

M

M

M

Princess Margaret

MP

R

M

M

Showbiz

MR

R

R

R

Pristine

W

R

M

M

Sun Flare

MY

R

M

M

Red Devil

MR

R

M

M

Sunsprite

DY

M

M

M

Silver Jubilee

PB

R

R

R

Trumpeter

OR

R

R

R

Tiffany

PB

M

M

M

Viva

DR

R

R

R

Touch of Class

PB

R

S

M

Climbers

Voodoo

OB

R

R

R

Altissimo

MR

R

M

M

Grandiflora

Dortmund

MR

R

R

R

Aquarius

PB

M

M

M

Dublin Bay

MR

R

R

R

Camelot

DP

M

M

M

Golden Showers

MY

M

M

M

Gold Medal

DY

M

M

M

Handel

RB

R

M

M

Love

RB

R

R

R

Joseph’s Coat

RB

M

M

M

New Year

OB

R

M

R

Royal Sunset

AB

R

R

R

Color Classification:

Disease Reaction: R = Resistant; M = Moderate Resistance; S = Susceptible