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 Apricot 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.

Betania

Active

Solanum lycopersicum L. · Tomato

SAKATA SEED AMERICA INC US

2 records

Basilea

Active

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

4 records

Bacioty

Active

Solanum lycopersicum L. var. lycopersicum · Tomato

NIRIT SEEDS

2 records

Baroncino

Application submitted

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

3 records

Barmet

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Astuto

Active

Solanum lycopersicum L. · Tomato

HM.Clause S.A.S.

3 records

Bakara

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

Armylla

Active

Solanum lycopersicum L. · Tomato

SEMILLAS FITO, S.A.

2 records

Balhi

Active

Cucurbita pepo L. · Field pumpkin

HM.Clause S.A.S.

3 records

Arkana

Active

Cucurbita pepo L. · Field pumpkin

HM.Clause S.A.S.

3 records

Ateneo

Active

Solanum lycopersicum L. · Tomato

SEMILLAS FITO, S.A.

3 records

Aziya

Active

Solanum lycopersicum L. · Tomato

Yuksel Tohumculuk LTD

3 records

Aryza

Active

Solanum lycopersicum L. · Tomato

SEMILLAS FITO, S.A.

2 records

Anissia

Active

Solanum lycopersicum L. · Tomato

HM.Clause S.A.S.

3 records

Aurantino

Active

Solanum lycopersicum L. · Tomato

UNITED GENETICS SEEDS CO

2 records

Attrio

Active

Solanum lycopersicum L. · Tomato

Nunhems B.V.

4 records

Atakama

Terminated

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Amaiary

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Anemon

Terminated

Solanum lycopersicum L. · Tomato

YISSUM, Research Development Company of the Hebrew University of Jerusalem

5 records

Alvalade

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Aquarita

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Amantyno

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

3 records

Alfrid

Active

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

2 records

Aluwa

Application submitted

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 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.