Diseases
Malus domestica (Suckow) Borkh.
A fungal disease of apple trees caused by the obligate parasite Podosphaera leucotricha. It is characterized by the appearance of a grey-white coating on young shoots, leaves, and inflorescences, causing them to deform and wither.
In the reference 1 127 varieties crop Apple, where this is mentioned in the description.
The pathogen is the fungus Podosphaera leucotricha (anamorph Oidium farinosum), which primarily infects non-lignified plant parts via haustoria. The pathogen overwinters as mycelium inside fruit and vegetative buds, from which infected shoots develop in the spring.
The disease manifests as a powdery coating, which eventually acquires a reddish hue. Affected leaves curl and lose turgidity, inflorescences become deformed and drop, and a characteristic 'russet netting' may form on the fruit.
In apple breeding for resistance to the pathogen, the introgression of specific genes, such as Pl-1, Pl-2, Pl-w, and Pl-d, plays a key role. Molecular marker methods are used to identify resistant genotypes, often in combination with scab immunity assessment.
General information about the subject — on the page Powdery mildew.
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
Uniwersytet Przyrodniczy w Poznaniu
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
Malus domestica (Suckow) Borkh. · Apple
VANDEPOEL-BEETEN
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
VECHER WILLIAM (US)
Malus domestica (Suckow) Borkh. · Apple
Pepinieres et Roseraies Georges Delbard| FR
Malus domestica (Suckow) Borkh. · Apple
Luby, James / University of Minnesota
Malus domestica (Suckow) Borkh. · Apple
Schniga GmbH (IT)
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Purdue Research Foundation (US)
Malus domestica (Suckow) Borkh. · Apple
Prof. Dr. Hanna Schmidt / Dr. Jutta Krüger in Bundesforschungsanstalt für gartenbauliche Pflanzenzüchtung
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Institut Français des Productions Cidricoles (I.F.P.C.), Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Malus domestica (Suckow) Borkh. · Apple
STAYMAN (US)
Malus domestica (Suckow) Borkh. · Apple
PEASGOOD (GB)
Malus domestica (Suckow) Borkh. · Apple
SERIDA
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Malus domestica (Suckow) Borkh. · Apple
Purdue Research Foundation (PRF)
Malus domestica (Suckow) Borkh. · Apple
SERIDA
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple