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 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 4 Almond 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.

Tropical Gem

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

Topazio

Active

Cucurbita pepo L. · Field pumpkin

Syngenta Seeds B.V.

2 records

UMH 1422

Active

Solanum lycopersicum L. · Tomato

JUAN J.RUÍZ MARTÍNEZ/SANTIAGO GARCÍA MARTÍNEZ/MANUEL VALERO ROCHE/ANTONIO FERRÁNDEZ SALA/ADRIÁN GRAU SÁNCHEZ/ARANTZAZU ALONSO SANCHÍS/FERNANDO RUBIO LÓPEZ

3 records

UMH 1209

Active

Solanum lycopersicum L. · Tomato

JUAN JOSE RUIZ MARTINEZ/SANTIAGO GARCIA MARTINEZ

3 records

Tojiro

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

UMH 1139

Active

Solanum lycopersicum L. · Tomato

JUAN J.RUÍZ MARTÍNEZ/SANTIAGO GARCÍA MARTÍNEZ/MANUEL VALERO ROCHE/ANTONIO FERRÁNDEZ SALA/ADRIÁN GRAU SÁNCHEZ/ARANTZAZU ALONSO SANCHÍS/FERNANDO RUBIO LÓPEZ

3 records

Tiway

Terminated

Solanum lycopersicum L. · Tomato

Seminis Vegetable Seeds

2 records

UGI 1796

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS ITALIA S.P.A

2 records

Tiktial

Active

Lactuca sativa L. · Lettuce

Syngenta Crop Protection AG

4 records

Tisey

Active

Solanum lycopersicum L. · Tomato

Bayer Holland B.V.

5 records

Tilos ND

Application submitted

Cucurbita pepo L. · Field pumpkin

Syngenta Crop Protection AG

3 records

Tovi Rosalia

Terminated

Solanum lycopersicum L. · Tomato

ZERAIM GEDERA

2 records

Truvatura

Active

Solanum lycopersicum L. · Tomato

Vilmorin-Mikado S.A.S.

3 records

Tastyno

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

2 records

Tenaz

Active

Solanum lycopersicum L. · Tomato

NEZZALEZ, S.L.

2 records

Tovi Star

Active

Solanum lycopersicum L. · Tomato

ZERAIM GEDERA

2 records

Topuria

Active

Solanum lycopersicum L. · Tomato

Vilmorin-Mikado SAS (FR)

2 records

Tafury

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Tolentina

Active

Solanum lycopersicum L. · Tomato

CAPITAL GENETIC EBT, S.L.

2 records

Teocle

Active

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

3 records

Sweet Flame

Active

Cucumis melo L. · Melon

Nunhems B.V./Laboratioire ASL S.N.C.

4 records

Susanello

Terminated

Solanum lycopersicum L. · Tomato

Nunhems B.V.

4 records

Syrine

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Talete

Active

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

ISI SEMENTI SPA

2 records

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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.