Guinea
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
4 records
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.
Guarapo
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
3 records
Gynial
ActiveCucumis sativus L. · Cucumber
Vilmorin SA (FR)
FR
2 records
Gardenberry
ActiveSolanum lycopersicum L. · Tomato
TOKITA SEED CO LTD
NL
2 records
Graziano
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
4 records
Gourmet Sweet
ActiveSolanum lycopersicum L. · Tomato
Poul Erik Olgaard
PL
2 records
Golotyna
ActiveSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
2 records
Goudski
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
4 records
Garrioso
Application submittedSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
GLX Star
ActiveFestuca arundinacea Schreb. · Tall fescue
PURE SEED TESTING
FR
2 records
Gloriette
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
2 records
Fyper
ActiveSolanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
ES
2 records
Gaheris
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Ginfiz
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
2 records
Fruty 260
ActiveSolanum lycopersicum L. · Tomato
Vilmorin SA (FR)
FR
2 records
Framboo
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
3 records
Giubilo
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
3 records
Flamansun
ActiveSolanum lycopersicum L. · Tomato
HM.Clause S.A.S.
FR
3 records
Fortitude
Application submittedSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
3 records
Fortunato
ActiveSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
4 records
Fortamino
Activehybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Enza Zaden Beheer B.V.
NL
4 records
Gavilan
ActiveSolanum lycopersicum L. · Tomato
CAPITAL GENETIC EBT, S.L.
ES
2 records
Gerdicia
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Fogo
Application submittedhybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Enza Zaden Beheer B.V.
NL
3 records