Diseases
Malus domestica (Suckow) Borkh.
A fungal disease of apple trees caused by the ascomycete fungus Venturia inaequalis, affecting all aerial parts of the plant. The disease manifests as characteristic dark spots with a velvety coating, causing fruit deformation, premature leaf drop, and reduced crop quality.
In the reference 1 949 varieties crop Apple, where this is mentioned in the description.
The pathogen is the highly specialized parasite Venturia inaequalis. The fungus's life cycle includes a teleomorph, which overwinters in fallen leaves, and an anamorph, Fusicladium dendriticum, responsible for secondary infection during the growing season. The disease affects leaves, petioles, pedicels, and fruits, on which spots with an olive-black coating form, leading to cracking and tissue deformation.
Genetic resistance of varieties to the pathogen is associated with Rvi loci. The most well-known is the Rvi6 gene, previously designated as Vf; however, the high variability of the fungal population has led to the emergence of race 6 of the pathogen, which is capable of overcoming this resistance. To ensure long-term immunity, breeding programs are focused on pyramiding several resistance genes, such as Rvi2, Rvi3, Rvi5, and Rvi15.
General information about the subject — on the page Scab.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Malus domestica (Suckow) Borkh. · Apple
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, France
Malus domestica (Suckow) Borkh. · Apple
Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.
Malus domestica (Suckow) Borkh. · Apple
Stichting Wageningen Research - Wageningen Plant Research, 6708 PB Wageningen
Malus domestica (Suckow) Borkh. · Apple
STATION FEDERALE RAC
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Pepinieres et Roseraies Georges Delbard| FR
Malus domestica (Suckow) Borkh. · Apple
THE KENT INCORPORATED SOCIETY
Malus domestica (Suckow) Borkh. · Apple
SNC Elaris| FR
Malus domestica (Suckow) Borkh. · Apple
VERBEEK JANUS /DE COSTER HENDRICK /SWILLEN GEORGES
Malus domestica (Suckow) Borkh. · Apple
SNC Elaris| FR
Malus domestica (Suckow) Borkh. · Apple
TAKAO HIRARAGI
Malus domestica (Suckow) Borkh. · Apple
THOME HAROLD
Malus domestica (Suckow) Borkh. · Apple
Purdue Research Foundation (US)
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
SANDIDGE JR. - CHARLES R.
Malus domestica (Suckow) Borkh. · Apple
VÝZKUMNÝ A ŠLECHTITELSKÝ ÚSTAV OVOCNÁŘSKÝ HOLOVOUSY s.r.o. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
STATION FEDERALE RAC
Malus domestica (Suckow) Borkh. · Apple
Institute of Experimental Botany AS CR, Czech Republic
Malus domestica (Suckow) Borkh. · Apple
Stichting Wageningen Research - Wageningen Plant Research, 6708 PB Wageningen
Malus domestica (Suckow) Borkh. · Apple
Volz Richard