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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.

Rajka

Active

Malus domestica (Suckow) Borkh. · Apple

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

CZ HU NL PL SK
19 records

La Flamboyante

Active

Malus domestica (Suckow) Borkh. · Apple

STATION FEDERALE RAC

FR
9 records

Inogo

Active

Malus domestica (Suckow) Borkh. · Apple

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, France

FR UA
11 records

Gloster

Active

Malus domestica (Suckow) Borkh. · Apple

RUP «BRESTSKAYA OBLASTNAYA SELSKOXOZYAJSTVENNAYA OPYTNAYA STANCZIYA NAN BELARUSI»

CZ HU NL PL SI
14 records

Elise

Active

Malus domestica (Suckow) Borkh. · Apple

VERHAEGH| Jacobus Johannes Verhaegh

BE DE FR NL PL
18 records

Crowngold

Active

Malus domestica (Suckow) Borkh. · Apple

National Fruit Trials (R. Stapleton)

BE DE FR NL
11 records

Bohemia

Active

Malus domestica (Suckow) Borkh. · Apple

THOR JOSEF /AGRICULTURAL COOPERATIVE SYCHROV

BE CZ FR NL PL SK
16 records

Yataka

Active

Malus domestica (Suckow) Borkh. · Apple

TAKAO HIRARAGI

DE FR NL
9 records

Wursixo

Active

Malus domestica (Suckow) Borkh. · Apple

Stichting Wageningen Research - Wageningen Plant Research, 6708 PB Wageningen

PL
7 records

Vanda

Active

Malus domestica (Suckow) Borkh. · Apple

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

CZ DE FR NL SK
13 records

UEB 4702/1

Active

Malus domestica (Suckow) Borkh. · Apple

CZ UA
8 records

Sandidge

Active

Malus domestica (Suckow) Borkh. · Apple

SANDIDGE JR. - CHARLES R.

FR NL
11 records

Rubinstep

Active

Malus domestica (Suckow) Borkh. · Apple

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

CZ NL
13 records

Red Idared

Active

Malus domestica (Suckow) Borkh. · Apple

THOME HAROLD

FR HU NL
9 records

Red Chief

Active

Malus domestica (Suckow) Borkh. · Apple

CZ HU
13 records

Priscilla

Active

Malus domestica (Suckow) Borkh. · Apple

Purdue Research Foundation (US)

FR NL SI
11 records

Monidel

Active

Malus domestica (Suckow) Borkh. · Apple

Pepinieres et Roseraies Georges Delbard| FR

BE DE FR NL
12 records

M 26

Active

Malus domestica (Suckow) Borkh. · Apple

LT NL RO
6 records

Luiza

Active

Malus domestica (Suckow) Borkh. · Apple

KVITSCHAL Marcus Vinicius (BR)/CRESTANI HAWERROTH Maraisa (BR)/DENARDI Frederico (BR)

FR
7 records

Galmac

Active

Malus domestica (Suckow) Borkh. · Apple

STATION FEDERALE RAC

FR NL
11 records

Fiero

Active

Malus domestica (Suckow) Borkh. · Apple

VAN LEUVEN MYLES

FR
8 records

Decosta

Active

Malus domestica (Suckow) Borkh. · Apple

VERBEEK JANUS /DE COSTER HENDRICK /SWILLEN GEORGES

BE DE FR NL
12 records

Dalili

Active

Malus domestica (Suckow) Borkh. · Apple

SNC Elaris| FR

DE FR NL PL
15 records

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