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.
Pyrus communis L. · European pear
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Pyrus communis L. · European pear
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Pyrus communis L. · European pear
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Solanum tuberosum L. · Potato
Andriienko Ivan Ivanovych, Mel`nyk Pavlo Oleksiiovych, Pysarenko Nataliia Vasylivna, Honcharenko Ol`ha Petrivna, Sydorchuk Svitlana Volodymyrivna, Popereshniuk Valentyna Mykolaivna, Dems`ka Anastasiia Kyrylivna, Muzyka Lidiia Ivanivna, Sydorchuk Vasyl Iva
Cucumis sativus L. · Cucumber
Asgrow Seed Company (US)
Cucumis sativus L. · Cucumber
Kyrylov Mykhailo Ivanovych, Dubinin Serhii Volodymyrovych,
Solanum tuberosum L. · Potato
Starovoit Vitalii Borysovych, Sobran Vasyl Mykhailovych, Balashova Halyna Stanislavivna, Zelia Aurika Heorhiivna, Tymko Liudmyla Volodymyrivna, Furdyha Mykola Mykolaiovych, Bondarchuk Anatolii Andriiovych, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Ivanovy
Cucumis sativus L. · Cucumber
HENK VAN KOOTEN
Malus domestica (Suckow) Borkh. · Apple
FISCHER MANFRED| Prof. Dr. Manfred Fischer
Solanum tuberosum L. · Potato
Sharapa Liubov Panasivna, Dan`ko Heorhii Vasyl`ovych, Manoilo Halyna Vasylivna, Khomenko Larysa Dmytrivna, Petrenko Kateryna Oleksandrivna, Onyshcenko Oleh Fedorovych,
Malus domestica (Suckow) Borkh. · Apple
FISCHER MANFRED| Prof. Dr. Manfred Fischer / PAETZOLD| Guenter Paetzold im Institut fuer Obstzuechtung Dresden-Pillnitz
Malus domestica (Suckow) Borkh. · Apple
FISCHER MANFRED| Prof. Dr. Manfred Fischer
Solanum tuberosum L. · Potato
Cherednychenko Liuba Mykolaivna, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Bondarchuk Anatolii Andriiovych, Nazar Stefaniia Hryhorivna, Osypchuk Andrii Antonovych,
Cucumis sativus L. · Cucumber
Arkadiusz Labrzycki
Solanum tuberosum L. · Potato
Boreiko Oksana Olehivna, Sidakova Oksana Vladyslavivna, Kupriianova Tetiana Mykolaivna, Kyrylishyn Vasyl` Vasyl`ovych, Zakharchuk Nataliia Anatoliivna, Zelia Avreliia Heorhiivna, Furdyha Mykola Mykolaiovych, Bondarchuk Anatolii Andriiovych,
Cucumis sativus L. · Cucumber
Harris Moran Seed Company (USA) (US)
Malus domestica (Suckow) Borkh. · Apple
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Malus domestica (Suckow) Borkh. · Apple
Kondratenko Tetiana IEhorivna, Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Cucumis sativus L. · Cucumber
Mazereeuw Jaap
Solanum tuberosum L. · Potato
SAKA| SaKa Pflanzenzucht GmbH & Co. KG
Solanum tuberosum L. · Potato
Pryvatne aktsionerne tovarystvo naukovo-vyrobnyche ob’iednannia «Chernihivelitkartoplia»
Malus domestica (Suckow) Borkh. · Apple
Tsuneo Murakami (JP)
Solanum tuberosum L. · Potato
Konst Research, Aardappelveredelingsbedrijf B.V.
Solanum tuberosum L. · Potato
Kravchenko Oleksii Arsentiiovych, Podhaiets`kyi Anatolii Adamovych, Voitseshyna Nataliia Ivanivna, Bondarchuk Anatolii Andriiovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Nazar Stefaniia Hryhorivna, Osypchuk Andrii Antonovych,