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.

Brickyard

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

2 records

Brabante

Terminated

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

4 records

Byelsa

Active

Solanum lycopersicum L. · Tomato

SEMILLAS FITO, S.A.

3 records

Berta

Terminated

Solanum lycopersicum L. · Tomato

WESTERN SEED ESPAÑA, S.A.

2 records

Bulls

Active

Solanum lycopersicum L. · Tomato

Yuksel Tohumculuk LTD

2 records

Caboverde

Terminated

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Bolinka

Terminated

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Bravado

Terminated

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

3 records

Brentyla

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

3 records

Bosco

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

4 records

Bauna

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

2 records

Bonbolya

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

2 records

Barbarela

Active

Solanum lycopersicum L. · Tomato

Vilmorin-Mikado S.A.S.

3 records

Boludo

Terminated

Solanum lycopersicum L. · Tomato

Seminis Vegetable Seeds

2 records

Baton Rouge

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

3 records

Bellarax

Active

Solanum lycopersicum L. · Tomato

Axia Vegetable Seeds B.V.

3 records

Baffin

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

3 records

Basenji

Active

Solanum lycopersicum L. · Tomato

ZENITH SEMILLAS, S.L.

2 records

Bejo 3212

Active

Solanum lycopersicum L. · Tomato

Bejo Zaden B.V.

3 records

Barronto

Active

Solanum lycopersicum L. · Tomato

MERIDIEM SEEDS S.L.

2 records

Ausino

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Bayraq

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

2 records

Barbounia

Terminated

Phaseolus vulgaris L. · Common bean

HAO-DEMETER Vine, Fruit Trees and Vegetable Research Institute

2 records

Batool

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

2 records

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Diseases

Powdery mildew 33 570
Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
Leaf spot diseases 15 926
Rust 14 859
Verticillium wilt 12 175
Scab 12 064

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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.