Diseases

Leaf mold (brown leaf spot)

Passalora fulva

Leaf mold is a dangerous fungal disease of tomatoes causing premature leaf drying and yield loss. It develops predominantly in greenhouses under high humidity, manifesting as spotting and a velvety coating.

Mentioned in descriptions 5 283 varieties reference book.

Leaf mold manifests as chlorotic light-yellow spots on the upper side of the leaf blade, which eventually turn brown. On the underside of the leaf in the affected areas, a characteristic velvety coating develops, changing color from gray-white to olive or brown. The disease usually begins with the lower tier of leaves, leading to their abscission and a significant decrease in the photosynthetic activity of the plant.

The development of the pathogen depends directly on the microclimate in protected ground, where a high relative humidity of 75% and temperatures in the 20–27°C range create a favorable environment. A critical factor is the presence of condensation on the leaf surface, which promotes the germination of fungal spores. The incubation period of the infection ranges from 10 to 15 days.

Varietal resistance is provided by genetic Cf-genes that operate on the principle of recognizing parasite effectors and triggering a hypersensitive response. Since the fungus has high variability and the ability to form new races that overcome protection, gene pyramiding is used in breeding. Resistance assessment in variety testing is conducted using laboratory methods and in infectious backgrounds based on the absence of sporulation.

Sources10

Breakdown by crop

Tomato Leaf Mold 1 086 Cucumber Scab 568 Tomato Leaf Mold 22 Leaf mold — Tomato (interspecific hybrids) 18 Cladosporium leaf blotch — Soft wheat 15 Melon Scab 5 Cladosporium Spot of Barley 3 Leaf mold of Solanum lycopersicum x Solanum pimpinellifolium interspecific hybrid 3

Found in these crops

Tomato 1 141 Cucumber 474 Tomato 23 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 21 Tall fescue 16 Bread wheat 9 Perennial ryegrass 8 Garden strawberry 6 Barley 5 Melon 4 Potato 3 European pear 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.

Sanmaxello XR

Application submitted

Solanum lycopersicum L. · Tomato

Axia NL B.V.

2 records

SALITRE

Application submitted

Cucumis sativus L. · Cucumber

IBEROSEEDS COMPAÑIA IBERICA DE SEMILLAS, S.L.

1 record

RX 03301930/ Merenha F1

Active

Cucumis sativus L. · Cucumber

Hary Bessels

1 record

SC-21050

Application submitted

Solanum lycopersicum L. · Tomato

Harmoniz

1 record

Sapanta

Withdrawn

Cucumis sativus L. · Cucumber

Enza Zaden Beheer B.V.

1 record

Romanto

Application submitted

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

2 records

ROSASTELLA

Application submitted

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

1 record

Rais F1

Active

Cucumis sativus L. · Cucumber

Shevkunov Valerii Mykolaiovych, Shamshyna Hanna Viacheslavivna, Portiankin Oleksii IEvhenovych, Havrysh Serhii Fedorovych,

2 records

Rafynda

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

1 record

Promito

Active

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

3 records

PORTOS

Terminated

Solanum lycopersicum L. · Tomato

Seminis Vegetable Seeds

1 record

PINK BUSH F1

Active

Solanum lycopersicum L. · Tomato

Don Reed

2 records

Pink Nice

Active

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

1 record

Potomak F1

Active

Cucumis sativus L. · Cucumber

Hari Besels

1 record

Pink Unicum F1

Terminated

Solanum lycopersicum L. · Tomato

J. Hoogstarten

2 records

PH5029

Application submitted

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

Pink AiDi

Active

Solanum lycopersicum L. · Tomato

Il Yong Kim

2 records

Pink Drim

Terminated

Solanum lycopersicum L. · Tomato

Naumov Ruslan Olehovych, Krasniuk Viacheslav Anatoliiovych,

2 records

Platus F1

Terminated

Solanum lycopersicum L. · Tomato

Maren Shutte, Ad Barten,

1 record

Ostozhenka F1

Active

Solanum lycopersicum L. · Tomato

Vasyl`ieva Marharyta IUrivna, Dehovtsova Tetiana Volodymyrivna, Hladkov Dmytro Oleksandrovych, Volok Ol`ha Anatoliivna, Amcheslavs`ka Olena Valentynivna, Moriev Viktor Vasyl`ovych, Havrysh Serhii Fedorovych,

2 records

Patronax

Active

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

Axia Vegetable Seeds B.V.

1 record

Oranzh Plam

Active

Solanum lycopersicum L. · Tomato

Tovarystvo z obmezhenoiu vidpovidalnistiu "SPARK SIDZ"

2 records

Orfeus F1/Orfeus F1

Terminated

Cucumis sativus L. · Cucumber

Srbek Liubosh, Oliva IAn, Horal Irzhi, Tyshkovs`kyi Volodymyr Mykhailovych,

1 record

Pasalimo F1

Active

Cucumis sativus L. · Cucumber

Vol`fhanh Otte

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

All terms →

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.