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
Khodakivs`ka IUliia Borysivna, Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Solanum tuberosum L. · Potato
Stet Holland B.V.
Solanum tuberosum L. · Potato
Siharova Dina Dmytrivna, Panasiuk Oleksandr Vasyl`ovych, Sadivs`kyi Myron Vasyl`ovych, Lischak Ivan Oleksiiovych, Loik Mariia Vasylivna, Zaviriukha Petro Danylovych, Tymoshenko Ivan Ivanovych, Snityns`kyi Volodymyr Vasyl`ovych,
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Pyrus communis L. · European pear
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
Dr. Franz Ruess LVWO Weinsberg
Solanum tuberosum L. · Potato
Dudar Ivan Frankovych, Lytvyn Ol`ha Fedorivna, Vlokh Volodymyr Hryhorovych,
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Beta vulgaris Garden Beet Group · Garden beet
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Malus domestica (Suckow) Borkh. · Apple
VERHAERT ERIK
Malus domestica (Suckow) Borkh. · Apple
Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Pyrus communis L. · European pear
Krasulia Tetiana Ivanivna, Tolstolik Liudmyla Mykolaivna, Maksymova Iryna Mykolaivna,
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Pyrus communis L. · European pear
Information not available - Contact NL authorities
Cucumis sativus L. · Cucumber
TROPICASEM (SN)
Malus domestica (Suckow) Borkh. · Apple
BILSEN MARC & RIK*
Malus domestica (Suckow) Borkh. · Apple
VERHAERT ERIK
Malus domestica (Suckow) Borkh. · Apple
APP Darzkopibas instituts
Pyrus L. · Pear
LAND SACHSEN| Land Sachsen, vertreten durch Saechsisches Landesamt fuer Umwelt, Landwirtschaft und Geologie
Malus domestica (Suckow) Borkh. · Apple
Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Pyrus communis L. · European pear
Information not available - Contact NL authorities
Malus domestica (Suckow) Borkh. · Apple
J Bick Griffith (US)
Malus Mill. · Apple
Atanas Blagov