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Diseases

Apple Rust

Malus domestica (Suckow) Borkh.

A fungal disease of apple trees caused by heteroecious pathogens of the genus Gymnosporangium, which require juniper to complete their life cycle. It manifests as characteristic orange spots on leaves and the formation of aecia on their underside.

In the reference 106 varieties crop Apple, where this is mentioned in the description.

The primary causal agent of apple rust (Malus domestica) is the fungus Gymnosporangium tremelloides, which uses common juniper as its primary host. In global practice, the species Gymnosporangium yamadae and Gymnosporangium nidus-avis, which cause similar tissue damage, are also encountered.

Yellow-green circular spots form on the upper side of the apple leaves, which over time acquire a dark orange hue. Cone-shaped aecia form on the underside of the leaf, where spores mature, leading to premature defoliation and a decrease in plant productivity.

General information about the subject — on the page Rust.

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.

Minnewashta

Active

Malus domestica (Suckow) Borkh. · Apple

Luby, James / University of Minnesota

5 records

Jonnee

Active

Malus domestica (Suckow) Borkh. · Apple

Hilltop Orchards & Nurserie (US)

ES FR
5 records

E756-36

Active

Malus domestica (Suckow) Borkh. · Apple

Katherine M. Evans

3 records

Co-op 29

Active

Malus domestica (Suckow) Borkh. · Apple

Purdue Research Foundation (PRF)

3 records

Freedom

Active

Malus domestica (Suckow) Borkh. · Apple

FR HU LT NL PL
13 records

Rafzubex

Active

Malus domestica (Suckow) Borkh. · Apple

FR NL
10 records

Quinte

Active

Malus domestica (Suckow) Borkh. · Apple

CZ
7 records

Paulared

Active

Malus domestica (Suckow) Borkh. · Apple

LT PL
9 records

Julyred

Active

Malus domestica (Suckow) Borkh. · Apple

HU SI
5 records

Empire

Active

Malus domestica (Suckow) Borkh. · Apple

NL SI
7 records

MN80

Application submitted

Malus domestica (Suckow) Borkh. · Apple

Regents of the University of Minnesota / Regents of the University of Minnesota / Regents of the University of Minnesota

FR
3 records

Imperial Gala

Active

Malus domestica (Suckow) Borkh. · Apple

R.D. & P.J. Mitchell

FR
3 records

Gala Surf

Active

Malus domestica (Suckow) Borkh. · Apple

GFA BRISSET

4 records

Lakeland

Active

Malus domestica (Suckow) Borkh. · Apple

University of Minnesota (US)

FR
2 records

Galamic

Active

Malus domestica (Suckow) Borkh. · Apple

Jürgen Braun

3 records

WILMUTA

Active

Malus domestica (Suckow) Borkh. · Apple

3 records

Rome Beauty

Active

Malus domestica (Suckow) Borkh. · Apple

3 records

Redfree

Active

Malus domestica (Suckow) Borkh. · Apple

5 records

Greensleeves

Active

Malus domestica (Suckow) Borkh. · Apple

NL
5 records

Cardinal

Active

Malus domestica (Suckow) Borkh. · Apple

ES FR
7 records

Timočanka

Active

Malus domestica (Suckow) Borkh. · Apple

SI
3 records