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Diseases

Fusarium wilt of lettuce

Lactuca sativa L.

Tracheomycotic wilt of lettuce caused by the soil-borne fungus Fusarium oxysporum f. sp. lactucae. The disease affects the plant's vascular system, leading to yellowing, loss of turgor, and death.

In the reference 671 varieties crop Lettuce, where this is mentioned in the description.

The causal agent of the disease is the fungus Fusarium oxysporum f. sp. lactucae, which includes four main races: Fol: 1, 2, 3, and 4. The pathogen exhibits high variability, as evidenced by the identification of new isolates capable of overcoming the resistance of existing varieties.

Key symptoms of infection include chlorosis and unilateral wilting, which begin to appear from the 3–4 true leaf stage. A diagnostic sign is the browning of the vascular tissue on a cross-section of the stem. The disease develops most intensely at a soil temperature of approximately +27...+28°C.

Breeding efforts are aimed at developing hybrids resistant to combinations of pathogen races. In official catalogs, resistance is indicated by marker designations such as Fol: 1, Fol: 1–4, or Fusarium Defense, which confirms the presence of genetic protection against the corresponding types of the fungus.

General information about the subject — on the page Fusarium wilt and blight.

Sources8

Varieties of Lettuce 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.

Takita

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

NL
7 records

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
7 records

Kimeri

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

FR
4 records

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Carimbo

Active

Lactuca sativa L. · Lettuce

Vilmorin-Mikado SAS (FR)

FR
5 records

Batsun

Active

Lactuca sativa L. · Lettuce

NUNHEMS

NL
6 records

Kenita

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
6 records

Erudita

Terminated

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Mollie

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

FR
4 records

Tambay

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
7 records

Romanita

Active

Lactuca sativa L. · Lettuce

Syngenta UK Ltd

NL
6 records

Roselita

Active

Lactuca sativa L. · Lettuce

Syngenta Crop Protection AG

NL
5 records

Gabino

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Jessica

Active

Lactuca sativa L. · Lettuce

Panora s.p.a.

FR NL
5 records

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

NL
6 records

Colanzi

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
8 records

Kinesic

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Faramir

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer

NL
6 records

Cassenas

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
6 records

Magniski

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Kiley

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

Icevic

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

NL
5 records

Dakarai

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
6 records

Alborada

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

NL
6 records

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