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Diseases

Tomato Leaf Mold

Solanum lycopersicum L.

An economically significant disease of tomatoes caused by the fungus Passalora fulva, characterized by the appearance of chlorotic spots on leaves followed by the formation of an olive-brown velvety mold on their undersides.

In the reference 1 086 varieties crop Tomato, where this is mentioned in the description.

The causal agent of the disease is the monophagous fungus Passalora fulva. The pathogen possesses high genetic variability, which allows it to adapt to cultivar resistance genes; consequently, the classification of races includes numerous groups, and many previously effective resistance genes have lost their significance.

Symptoms appear on the leaves as ill-defined chlorotic spots, beneath which a characteristic velvety mold forms on the underside of the leaf blade, eventually turning olive or brown in color. As the disease progresses, the tissues become necrotic, leading to wilting, curling, and premature shedding of the leaves.

In tomato breeding, more than 20 resistance genes to the pathogen are known, designated as Cf. In professional cultivar descriptions, resistance is marked with codes Ff, Pf, or C, often with appended numbers indicating resistance to specific fungal races; however, such protection is not absolute and may be overcome by new aggressive strains.

General information about the subject — on the page Leaf mold (brown leaf spot).

Sources8

Varieties of Tomato mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

Connecta

Active

Solanum lycopersicum L. · Tomato

De Bolster B.V.

NL
4 records

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

NL
4 records

Cheramy

Active

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
4 records

Clobella

Application submitted

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

NL
3 records

Clanio

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

FR
2 records

Cascade

Active

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

FR
2 records

Careion

Application submitted

Solanum lycopersicum L. · Tomato

Nunhems Netherlands B.V.

NL
3 records

Cinea

Terminated

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

FR
2 records

Cibello

Active

Solanum lycopersicum L. · Tomato

Syngenta Crop Protection AG

NL
3 records

Solanum lycopersicum L. · Tomato

Axia NL B.V.

NL
3 records

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
4 records

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

NL
3 records

Cherye

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

NL
4 records

Chekero

Active

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

NL
4 records

Bronsino

Terminated

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

NL
2 records

Caroleza

Active

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

NL
4 records

Solanum lycopersicum L. · Tomato

De Bolster B.V.

NL
4 records

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

FR
2 records

Solanum lycopersicum L. · Tomato

De Bolster B.V.

NL
3 records

Caraiben

Application submitted

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

NL
3 records

Camiletto

Application submitted

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
3 records

Solanum lycopersicum L. · Tomato

De Bolster B.V.

NL
3 records

Cardiola

Application submitted

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

NL
3 records

Solanum lycopersicum L. · Tomato

HAZERA SEEDS BV

ES
2 records

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