Swansea
ActiveLilium L. · Lily
Vletter & Den Haan Beheer B.V
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.
Breakdown by crop
Found in these crops
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.
Dohkko
ActiveSolanum lycopersicum x Solanum pimpinellifolium · Tomato
Syngenta Crop Protection AG
Dellinois
ActivePopulus deltoides W. Bartram ex Marshall · Eastern cottonwood
Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE) , Institut National de Recherche en Sciences et Technologies pour l’Environnement et l’Agriculture (IRSTEA), Institut Technologique FCBA
Admiral
ActiveSolanum lycopersicum L. · Tomato
NPF TOO «ILINICHNA»
SM Redstar
ActiveHordeum vulgare L. · Barley
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
PL
3 records
Owacja
ActiveTriticum aestivum L. · Bread wheat
Instytut Hodowli i Aklimatyzacji Roslin Panstwowy Instytut Badawczy
PL
6 records
Nota
TerminatedCucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Tobias
ActiveSolanum lycopersicum L. · Tomato
HU
NL
4 records
Harzglut
ActiveSolanum lycopersicum L. · Tomato
CZ
SK
3 records
Torino
ActiveSolanum lycopersicum L. · Tomato
CZ
SK
4 records
Grazioso
ActiveSolanum lycopersicum L. · Tomato
HU
UA
3 records
Midios
ActiveCucumis sativus L. · Cucumber
NL
SK
3 records
Delicatesse
Protection expiredCucumis sativus L. · Cucumber
HR
SI
3 records
Linda
ActiveCucumis sativus L. · Cucumber
CZ
SK
3 records
Cheer
ActiveCucumis sativus L. · Cucumber
CZ
SK
3 records
Artemis
ActiveCucumis sativus L. · Cucumber
CZ
NL
4 records
Halay 344
ActiveSolanum lycopersicum L. · Tomato
SK
4 records
Atomic
ActiveCucumis sativus L. · Cucumber
NL
3 records
TPC
ActiveFestuca arundinacea Schreb. · Tall fescue
CZ
3 records
Scotinos
ActiveCucumis sativus L. · Cucumber
NL
3 records
Next M
ActiveFestuca arundinacea Schreb. · Tall fescue
CZ
3 records
Malika
ActiveCucumis sativus L. · Cucumber
HU
3 records
Nectar
ActiveSolanum lycopersicum L. · Tomato
NL
4 records
Naram
ActiveSolanum lycopersicum L. · Tomato
NL
3 records