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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.

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.

Mored

Active

Malus domestica (Suckow) Borkh. · Apple

Moors Jozef Jan

6 records

Schniga

Active

Malus domestica (Suckow) Borkh. · Apple

Schniga GmbH, D

NL
5 records

Saireline

Active

Malus domestica (Suckow) Borkh. · Apple

Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE) , Institut Français des Productions Cidricoles (I.F.P.C.)

FR
5 records

Nela

Active

Malus domestica (Suckow) Borkh. · Apple

Prof. Jaroslav Tupy c/o Institute of Experimental Botany

CZ DE
5 records

Golden Orange

Active

Malus domestica (Suckow) Borkh. · Apple

Antonio Bergamini

4 records

Redsleeves

Active

Malus domestica (Suckow) Borkh. · Apple

THE KENT INCORPORATED SOCIETY

NL
4 records

Heliodor

Active

Malus domestica (Suckow) Borkh. · Apple

Ústav experimentální botaniky AV ČR, v.v.i. (CZ)

CZ
8 records

Collina

Active

Malus domestica (Suckow) Borkh. · Apple

V.O.F. VANDEWALL

NL
6 records

Ametyst

Active

Malus domestica (Suckow) Borkh. · Apple

Ústav experimentální botaniky AV ČR, v.v.i. (CZ)

CZ NL
12 records

Golden Treat

Active

Malus domestica (Suckow) Borkh. · Apple

Vailima Orchard Ltd (NZ)

FR
4 records

Reinette de France

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

FR NL
3 records

Arlet

Active

Malus domestica (Suckow) Borkh. · Apple

Station de Recherche de Wadenswil (CH)

FR NL
7 records

Golden Gem

Active

Malus domestica (Suckow) Borkh. · Apple

ES
5 records

Frequinette

Active

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)

FR
5 records

Treladine

Active

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)

FR
5 records

Braecest

Active

Malus domestica (Suckow) Borkh. · Apple

EARL des Sources (FR)

FR
6 records

Romagold

Active

Malus domestica (Suckow) Borkh. · Apple

SURKIJN Romain (BE)/Pepinieres Rene Nicolai SA (BE)

FR NL
7 records

Zuzi Gala

Active

Malus domestica (Suckow) Borkh. · Apple

Gospodarstwo Szkółkarskie Andrzej i Szymon Nowakowscy

NL PL
7 records

Mc. Intosh

Active

Malus domestica (Suckow) Borkh. · Apple

ES NL
7 records

X9589

Active

Malus domestica (Suckow) Borkh. · Apple

Jean-Luc Carrieres

FR
5 records

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