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
Institut Francais des Productions Cidricoles (FR)/Institut National de la Recherche Agronomique (FR)
Malus domestica (Suckow) Borkh. · Apple
Michael Neumüller
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
NOLENS VINCENT
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
MARRAS ANDRE (FR)
Malus domestica (Suckow) Borkh. · Apple
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Malus domestica (Suckow) Borkh. · Apple
FAW Eidgenössische Forschunganstalt für Obst- Wein- und Gartenbau
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
Institute of Fruit Crops-Kyustendil
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Sempra Praha a.s., CZ
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
STICHTING WAGENINGEN RESEARCH-WAGENINGEN PLANT RESEARCH
Malus domestica (Suckow) Borkh. · Apple
DICKEY J.M. (US)
Malus domestica (Suckow) Borkh. · Apple
Institute of Fruit Crops-Kyustendil
Malus domestica (Suckow) Borkh. · Apple
HERRIS JOHN (GB)
Malus domestica (Suckow) Borkh. · Apple
Information not available - Contact NL authorities
Malus domestica (Suckow) Borkh. · Apple
SERIDA
Malus domestica (Suckow) Borkh. · Apple
Lenkijos sodininkystės ir gėlininkystės institutas
Malus domestica (Suckow) Borkh. · Apple
Kondratenko Tetiana IEhorivna, Boldyzheva Liubov Dmytrivna, Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
Doslidna stantsiia pomolohii im. L.P. Symyrenka Instytutu sadivnytstva Natsionalnoi akademii ahrarny