Leonore
TerminatedLactuca sativa L. · Lettuce
Barb Neubert
Cultivation
Field-grown lettuce
Lactuca sativa L.
Growing lettuce in open fields requires the selection of varieties resistant to bolting under long-day conditions and the management of downy mildew. The crop is characterized by high earliness, which allows for succession planting, and the ability to tolerate frosts down to -2 °C.
In the reference 1 060 varieties crop Lettuce, where this is mentioned in the description.
When cultivating lettuce in open fields, sensitivity to photoperiodism and temperature is a critical factor. Summer varieties must possess bolting resistance, as excessive light and heat trigger premature transition to flowering. The plant's shallow root system requires consistent soil moisture maintenance, and non-woven row covers are often used to protect against heat stress.
Open-field technology involves using lettuce as an intercrop, which is feasible due to its short growing period of 25–40 days. Soil requirements are limited to a pH range of 6.0–6.8, and the quality of seedbed preparation must exclude large clods due to the small size of the seeds. Cold hardiness allows for winter and early spring sowing, while considering the necessity of protection against downy mildew, caused by the pathogen Bremia lactucae.
General information about the subject — on the page Open field.
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.
85 76 RZ
WithdrawnLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
Blonde lente à monter
TerminatedLactuca sativa L. · Lettuce
Service Officiel de Controle (FR)
FR
1 record
85 85 RZ
TerminatedLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
Godric
Application submittedLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
1 record
Anazeria
Application submittedLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
2 records
Besson
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Pacito
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
1 record
Lorthois
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Bourguignonne
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Furore
WithdrawnLactuca sativa L. · Lettuce
Syngenta Participations AG
NL
2 records
WAMBA
Application submittedLactuca sativa L. · Lettuce
RAMIRO ARNEDO, S.A.
ES
1 record
De Trémont
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
TAVASCAN
Application submittedLactuca sativa L. · Lettuce
RAMIRO ARNEDO, S.A.
ES
1 record
LOCARNO RZ (85-81 RZ)
WithdrawnLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
ANTHONY RZ (85-74 RZ)
TerminatedLactuca sativa L. · Lettuce
RIJK ZWAAN Z.Z. B.V.
ES
1 record
ESTIBALIZ
WithdrawnLactuca sativa L. · Lettuce
RAMIRO ARNEDO, S.A.
ES
1 record
NOGATINE
TerminatedLactuca sativa L. · Lettuce
ROSSEN & CO B.V.
ES
1 record
D'hiver de Trémont
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
D'hiver de Trémont
TerminatedLactuca sativa L. · Lettuce
Domaine Public (FR)
FR
1 record
Papyon
Application submittedLactuca sativa L. · Lettuce
Yuksel Seeds B.V.
NL
2 records
Gradisca
WithdrawnLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Mysteria
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
1 record
Minetto
TerminatedLactuca sativa L. · Lettuce