Diseases

Peach leaf curl

Taphrina deformans

Peach leaf curl is a dangerous stone fruit disease caused by the fungus Taphrina deformans. It manifests as blistering and deformation of leaves, shoots, and fruits, leading to mass defoliation and a yield loss of up to 80%.

Mentioned in descriptions 3 891 varieties reference book.

The disease affects peach, nectarine, apricot, and almond, appearing immediately after bud break. Blisters of a pale green, yellow, or scarlet red color form on the leaves, and a whitish waxy coating eventually appears on their undersides. Shoots thicken and become twisted, while affected fruits develop a smooth surface, become covered in cracks, and drop off.

Pathogen development depends on weather conditions: the critical infection period is a cool and humid spring with temperatures between +6 and +15°C. The fungus overwinters on the surface of branches, in bark crevices, and within bud scales. Upon the arrival of dry and hot weather with temperatures above +26°C, infection activity ceases.

The concept of complete resistance to the disease does not exist; however, varietal resistance is often linked to differences in bud break timing: late-maturing varieties are less likely to encounter the peak of pathogen activity. Resistance evaluation in variety testing is conducted visually using a point scale in collection orchards under comparative monitoring in identical conditions.

Sources10

Breakdown by crop

Tomato Leaf Curl 732 Peach leaf curl 283 Bean leaf curl 32 Squash Leaf Curl 24 Lettuce leaf curl 23 Tomato leaf curl 22 Cucumber leaf curl 19 Parsley leaf curl 12 Leaf curl — Kale 8 Pepper Leaf Curl 6 Peach leaf curl of nectarine 6 Curly Top — Sugar Beet 5 Melon Leaf Curl 4 Peach leaf curl of almond 4 Leaf curl — Savoy cabbage 4 Apricot leaf curl 3

Found in these crops

Tomato 942 Peach 280 Field pumpkin 33 Tomato 24 Cucumber 16 Lettuce 14 Nectarine 6 Melon 6 Bell pepper 5 Almond 4 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 4 Curly kale 3

Varieties that feature this in their description

Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.

UGI 57914

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

UMH 1400

Active

Solanum lycopersicum L. · Tomato

JUAN JOSE RUIZ MARTINEZ/SANTIAGO GARCIA MARTINEZ

3 records

UFO_3

Active

Prunus persica (L.) Batsch · Peach

4 records

Valkirias

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

4 records

Vikingo

Active

Solanum lycopersicum L. · Tomato

Vilmorin-Mikado SAS (FR)

2 records

Tylcram

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

4 records

Tyanna

Active

Solanum lycopersicum L. · Tomato

Hazera Genetics Ltd (IL)

2 records

Varsity

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

4 records

Tyrsen

Active

Cucumis melo L. · Melon

Nunhems B.V., Laboratoire ASL S.N.C.

4 records

Tybalt

Active

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

3 records

Uyum

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Tremolo

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

3 records

UMH 1155

Active

Solanum lycopersicum L. · Tomato

Juan José Ruíz Martínez/Santiago García Martínez/Adrián Grau Sánchez/Arantzazu alonso Sanchis/Pedro Carbonell Cerda

5 records

Tropical Queen

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

Tremendity

Active

Solanum lycopersicum L. · Tomato

BHN SEED RESEARCH

2 records

Tyfrane

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

2 records

UGI 57414

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

Tovi Cala

Terminated

Solanum lycopersicum L. · Tomato

ZERAIM GEDERA

2 records

Trabuco

Active

Solanum lycopersicum L. · Tomato

RAMIRO ARNEDO, S.A.

2 records

Tyton

Active

Solanum lycopersicum L. · Tomato

CORA SEEDS S.R.L

2 records

Tovi Tesoro

Terminated

Solanum lycopersicum L. · Tomato

ZERAIM GEDERA

2 records

Tyscala

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

3 records

Tourmalet

Withdrawn

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Tovi Roca

Active

Solanum lycopersicum L. · Tomato

ZERAIM GEDERA

2 records

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Diseases

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.