Ivory Russet
ActiveSolanum tuberosum L. · Potato
ROCUS PIETER GRAVELAND
NL
22 records
Diseases
Scab
Scab is a group of crop diseases caused by fungi, actinomycetes, or plasmodiophoromycetes, manifesting as spots, ulcers, and deformations on vegetative and generative plant organs.
Mentioned in descriptions 12 064 varieties reference book.
Apple and pear scab affects leaves, flowers, ovaries, and fruits, manifesting as olive-colored spots with a velvety coating, which leads to fruit cracking and yield loss. In potatoes, several types of scab are distinguished: common scab, where ulcers appear on tubers, and powdery scab, characterized by the formation of warts that rupture into powdery ulcers, as well as root damage.
The development of the disease depends on environmental conditions: for fruit scab, high humidity and rainfall are favorable, while for potatoes, it depends on soil specifics (pH, temperature, and moisture). Varietal resistance is ensured by breeding based on major genes or their combinations. Absolutely immune varieties do not exist, so resistance often manifests as field resistance and depends on the climatic zone.
In variety trials, resistance is assessed visually using a scoring scale or in percentages under natural and artificial infection backgrounds. To increase the accuracy of breeding, molecular genetic marking is used, which allows for the detection of resistance genes by genotype, minimizing phenotypic evaluation errors.
Breakdown by crop
Found in these crops
Varieties that feature this in their description
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Solara
ActiveSolanum tuberosum L. · Potato
REITZIG DORLIES
AT
CZ
DE
DK
EE
FR
+8
20 records
Tomensa
ActiveSolanum tuberosum L. · Potato
REITZIG DORLIES
AT
CZ
DE
DK
ES
FR
+7
20 records
Inova
ActiveSolanum tuberosum L. · Potato
Van Rijn BV (NL)
CZ
FR
GR
NL
PL
SK
+1
22 records
Opal
ActiveSolanum tuberosum L. · Potato
Solana, D
CZ
DE
HR
PL
UA
22 records
El Mundo
ActiveSolanum tuberosum L. · Potato
STET HOLLAND
HR
NL
UA
21 records
Sunred
ActiveSolanum tuberosum L. · Potato
STET Holland B.V.
NL
UA
22 records
Sassy
ActiveSolanum tuberosum L. · Potato
GERMICOPA SAS
NL
SK
21 records
Memphis
ActiveSolanum tuberosum L. · Potato
SCHEHR MAURICE / HARM MULDER
NL
UA
26 records
Daifla
ActiveSolanum tuberosum L. · Potato
Germicopa, F
FR
MT
21 records
Nicola
ActiveSolanum tuberosum L. · Potato
SOLTAU| Raiffeisen Centralheide eG
AT
CZ
DE
ES
FI
FR
+4
17 records
Karlena
ActiveSolanum tuberosum L. · Potato
Steinbach/Pfeffer
CZ
DE
HR
HU
IE
LT
+4
16 records
Divina
ActiveSolanum tuberosum L. · Potato
VEREDELINGSBEDRIJF D. BIEMOND B.V.
BE
CZ
DE
DK
EE
FR
+4
20 records
Topaz
ActiveMalus domestica (Suckow) Borkh. · Apple
Veleminsky, Jiri
CZ
DE
FR
HU
NL
PL
+2
29 records
Bellarosa
ActiveSolanum tuberosum L. · Potato
Heinrich BOHM, DE
BG
CZ
HR
HU
PL
PT
+2
20 records
Almera
ActiveSolanum tuberosum L. · Potato
Svalof Weibull AB
AT
BG
CZ
HR
NL
PL
+1
18 records
Hermes
ActiveSolanum tuberosum L. · Potato
Saatbaugenossenschaft, A
AT
ES
IT
LU
NL
PL
+1
16 records
Symfonia
ActiveSolanum tuberosum L. · Potato
WALSMA| A. Walsma
CZ
DE
ES
HR
IT
NL
18 records
Gala
ActiveSolanum tuberosum L. · Potato
Wolfgang Walter
BG
DE
LT
LU
UA
22 records
Labadia
ActiveSolanum tuberosum L. · Potato
Van Rijn Group
GR
HR
NL
PL
UA
18 records
Evora
ActiveSolanum tuberosum L. · Potato
R.P.GRAVELAND
NL
UA
22 records
Alverstone Russet
ActiveSolanum tuberosum L. · Potato
R.P.GRAVELAND
NL
UA
22 records
Panamera
ActiveSolanum tuberosum L. · Potato
R.P.GRAVELAND
NL
17 records
Arielle
ActiveSolanum tuberosum L. · Potato
Cooeperatie Agrico U.A.
BG
CZ
EE
FI
HR
LT
+6
18 records