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Diseases

Apple Scab

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.

Sources8

Varieties of Apple mentioned in the description

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.

Red Dalinbel

Active

Malus domestica (Suckow) Borkh. · Apple

Dalival SAS (FR)

FR
3 records

Red Gold

Active

Malus domestica (Suckow) Borkh. · Apple

SHELL F.A. (US)

FR
2 records

Red Dalinsweet

Active

Malus domestica (Suckow) Borkh. · Apple

Dalival SAS (FR)

FR
3 records

Rambeau

Active

Malus domestica (Suckow) Borkh. · Apple

Domaine Public (FR)

FR
2 records

Primerouge

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

NL
2 records

Pitchounette

Active

Malus domestica (Suckow) Borkh. · Apple

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR
4 records

Pay Bou

Active

Malus domestica (Suckow) Borkh. · Apple

Groupe des Ressources Phytogenetiques d'Aquitaine (FR)

FR
2 records

Orange suisse

Active

Malus domestica (Suckow) Borkh. · Apple

Domaine Public (FR)

FR
2 records

Oliwka Żółta

Active

Malus domestica (Suckow) Borkh. · Apple

Instytut Ogrodnictwa - Państwowy Instytut Badawczy

PL
3 records

Norfolk Pippin

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

NL
2 records

Noël des champs

Active

Malus domestica (Suckow) Borkh. · Apple

Domaine Public (FR)

FR
2 records

Mutter-Apfel

Active

Malus domestica (Suckow) Borkh. · Apple

NL
4 records

Mivibe

Active

Malus domestica (Suckow) Borkh. · Apple

VÝZKUMNÝ A ŠLECHTITELSKÝ ÚSTAV OVOCNÁŘSKÝ HOLOVOUSY s.r.o. (CZ)

CZ
5 records

Nabella

Active

Malus domestica (Suckow) Borkh. · Apple

SEMPRA PRAHA A S

CZ
5 records

Muscadet de Dieppe

Active

Malus domestica (Suckow) Borkh. · Apple

Domaine Public (FR)

FR
2 records

Meteor

Active

Malus domestica (Suckow) Borkh. · Apple

VÝZKUMNÝ A ŠLECHTITELSKÝ ÚSTAV OVOCNÁŘSKÝ HOLOVOUSY s.r.o. (CZ)

CZ
8 records

Melfree

Active

Malus domestica (Suckow) Borkh. · Apple

Instytut Ogrodnictwa - Państwowy Instytut Badawczy

PL
4 records

Mettais

Active

Malus domestica (Suckow) Borkh. · Apple

Domaine Public (FR)

FR
2 records

Mammut

Active

Malus domestica (Suckow) Borkh. · Apple

Staatliche Lehr- und Versuchsanstalt für Wein- und Obstbau Weinsberg

DE
4 records

Mac Intosh

Active

Malus domestica (Suckow) Borkh. · Apple

INTOSH MAC (GB)

FR
2 records

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