Thor
ActiveSolanum tuberosum L. · Potato
Landbrugets Kartoffelfond
DK
4 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.
Theresa
ActiveSolanum tuberosum L. · Potato
HOFFERBERT| Dr. Hans-Reinhard Hofferbert
DE
8 records
Theda
ActiveSolanum tuberosum L. · Potato
Europlant Innovation GmbH & Co. KG
DE
5 records
Tamino
ActiveSolanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
DE
5 records
Swayne
ActiveCucumis sativus L. · Cucumber
Francisco Palomares
NL
3 records
Supernova
ActiveSolanum tuberosum L. · Potato
Teagasc Crops Research Department
IE
6 records
Styx
ActiveCucumis sativus L. · Cucumber
ENZA ZADEN
NL
3 records
Summerdel
WithdrawnMalus Mill. · Apple
WINKS CALVIN W.
IT
4 records
Stronga
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
4 records
Stacey
ActiveSolanum tuberosum L. · Potato
Lantmõnnen Seed B.V.
NL
5 records
Sterrata
ActiveCucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
SV0091CE
ActiveCucumis sativus L. · Cucumber
VEGETABLE MONSANTO B.V.
NL
5 records
Starkrimson Delicious
Application submittedMalus Mill. · Apple
Bisbee, Roy A
SK
3 records
Soprano
ActiveMalus domestica (Suckow) Borkh. · Apple
Pepinieres du Valois Sarl (FR)/Institut National de la Recherche Agronomique (FR)
FR
4 records
Solo
ActiveSolanum tuberosum L. · Potato
Bavaria Saat GbR
CZ
4 records
Solen
Protection expiredSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
4 records
Sokrates
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
5 records
Sonate
ActiveMalus domestica (Suckow) Borkh. · Apple
Prof. Jaroslav Tupy c/o Institute of Experimental Botany
DE
6 records
Sinap orlovskij
ActiveMalus domestica (Suckow) Borkh. · Apple
VNII SELEKCZII PLODOVYX KULTUR
LT
4 records
Shula
TerminatedSolanum tuberosum L. · Potato
SCOTTISH RESEARCH INSTITUTE
IE
4 records
SH C 1001
ActiveSolanum tuberosum L. · Potato
STET HOLLAND
NL
5 records
Schniga
ActiveMalus domestica (Suckow) Borkh. · Apple
Schniga GmbH, D
NL
5 records
Sarvari Piroska
ActiveSolanum tuberosum L. · Potato
Sarvari Istvan
HU
5 records
Sandrin
ActiveSolanum tuberosum L. · Potato
Winfried Lange, Frank Lange
DE
5 records