Diseases
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.
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.
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Malus domestica (Suckow) Borkh. · Apple
R.Dumbravs, L.Ikase
Solanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Cucumis sativus L. · Cucumber
Bayer Holland B.V.
Malus domestica (Suckow) Borkh. · Apple
Kalju Kask 85%, Laila Ikase 15%
Solanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
Solanum tuberosum L. · Potato
Bavaria Saat GbR
Solanum tuberosum L. · Potato
Pot Eerke
Malus domestica (Suckow) Borkh. · Apple
Szkola Glowna Gospodarstwa Wiejskiego
Solanum tuberosum L. · Potato
BRETAGNE PLANTS INNOVATION S.A.S.
Solanum tuberosum L. · Potato
Lietuvos agrarinių ir miškų mokslų centro Vokės filialas
Malus domestica (Suckow) Borkh. · Apple
Uno Kivistik
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum tuberosum L. · Potato
Bavaria Saat GbR
Malus domestica (Suckow) Borkh. · Apple
R.Dumbravs, L.Ikase
Malus domestica (Suckow) Borkh. · Apple
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Pyrus communis L. · European pear
Malus domestica (Suckow) Borkh. · Apple
Information not available - Contact NL authorities
Solanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
Cucumis sativus L. · Cucumber
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Malus domestica (Suckow) Borkh. · Apple
RUP «GRODNENSKIJ ZONALNYJ INSTITUT RASTENIEVODSTVA NAN BELARUSI»
Cucumis sativus L. · Cucumber
W. LEGUTKO PRZEDSIEBIORSTWO HODOWLANO NASIENNE SP.Z.O.O