Reinette du Canada
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
4 records
Diseases
Apple Powdery Mildew
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.
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.
Cidor
ActiveMalus domestica (Suckow) Borkh. · Apple
FR
3 records
Řehtáč soudkovitý
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records
Zlaťák
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records
Rumena lepocvetka
ActiveMalus domestica (Suckow) Borkh. · Apple
SI
2 records
Reinette Etoiléé
ActiveMalus domestica (Suckow) Borkh. · Apple
SI
2 records
Reinette Evagil
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
2 records
Chodské
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records
Karmen
ActiveMalus domestica (Suckow) Borkh. · Apple
Kaiser Wilhelm
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
6 records
Braeburn Superstar
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
2 records
Red Bohemia
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records
Revidar
ActiveMalus domestica (Suckow) Borkh. · Apple
RO
2 records
Cezar
ActiveMalus domestica (Suckow) Borkh. · Apple
RO
2 records
Antopa
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
8 records
Gewürzluiken
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
4 records
Clijo
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
2 records
Flordika
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records
Reinette Rouge Etoilée
ActiveMalus domestica (Suckow) Borkh. · Apple
SI
5 records
Herrenapfel
ActiveMalus domestica (Suckow) Borkh. · Apple
SI
3 records
Vysočina
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
5 records
Querina
ActiveMalus domestica (Suckow) Borkh. · Apple
HU
3 records
Howgate Wonder
ActiveMalus domestica (Suckow) Borkh. · Apple
NL
4 records
Coulonova reneta
ActiveMalus domestica (Suckow) Borkh. · Apple
CZ
4 records