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
KVITSCHAL Marcus Vinicius (BR)/CRESTANI HAWERROTH Maraisa (BR)/DENARDI Frederico (BR)
Malus domestica (Suckow) Borkh. · Apple
Markus Kobelt
Malus domestica (Suckow) Borkh. · Apple
KVITSCHAL Marcus Vinicius (BR)/CRESTANI HAWERROTH Maraisa (BR)/DENARDI Frederico (BR)
Malus domestica (Suckow) Borkh. · Apple
University of Minnesota (US)
Malus domestica (Suckow) Borkh. · Apple
VAN LEUVEN MYLES
Malus domestica (Suckow) Borkh. · Apple
Stephen Robert Glover Flightshott Farm Ltd.
Malus domestica (Suckow) Borkh. · Apple
HM the King in Right of Canada a.r.b the Minister of Agriculture and Agri-Food
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Manfred Fischer / Heinz Murawski + im Institut für Obstforschung Dresden-Pillnitz / Prof. Dr. Christa Fischer
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Manfred Fischer / Heinz Murawski + im Institut für Obstforschung Dresden-Pillnitz / Prof. Dr. Christa Fischer
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
ROY (US)
Malus domestica (Suckow) Borkh. · Apple
YOSHIDA| Yoshio Yoshida c/o Divison of Fruit Breeding Fruit Tree Research Station / HANIUDA| Tadayuki Haniuda c/o Laboratory of Biotechnology Agricultural Research Center / TSUCHIYA| Shichiro Tsuchiya c/o Laboratory of Fruit BreedingFruit Tree Research St
Malus domestica (Suckow) Borkh. · Apple
THE KENT INCORPORATED SOCIETY
Malus domestica (Suckow) Borkh. · Apple
University of Arkansas
Malus domestica (Suckow) Borkh. · Apple
STICHTING DLO-CENTRUM VOOR PLANTENVEREDELINGS-EN
Malus domestica (Suckow) Borkh. · Apple
Prof. Jaroslav Tupy c/o Institute of Experimental Botany
Malus domestica (Suckow) Borkh. · Apple
The Francois Family Trust (NZ)
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Christa Fischer
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
N.V. Johan Nicolaï
Malus domestica (Suckow) Borkh. · Apple
Institute of Experimental Botany AS CR, Czech Republic
Malus domestica (Suckow) Borkh. · Apple
Roduit Aebischer C. (FR)
Malus domestica (Suckow) Borkh. · Apple
SNC Elaris| FR