Craquerelle du Midi
ActiveLactuca sativa L. · Lettuce
Domaine Public (FR)
Cultivation
Protected cultivation involves the use of specialized varieties and hybrids adapted to the specific microclimate of greenhouses, hotbeds, and controlled-environment agriculture systems.
Mentioned in descriptions 24 262 varieties reference book.
Protected cultivation comprises a system of structures ranging from simple film shelters to high-tech greenhouses with automated climate control. Plants in such conditions develop under different levels of lighting, humidity, and temperature regimes, as well as in limited root zone volumes, which requires the selection of genetically adapted material, predominantly F1 hybrids.
The choice of a variety for closed environments depends on the crop's ability to develop fully under artificial lighting, its growth type, and compatibility with cultivation technologies, including substrate-based systems. Variety assessment is based on morphological traits, productivity, and the conformity of fruit characteristics to requirements for marketability, keeping quality, and transportability.
The resistance and high productivity of greenhouse varieties are driven by breeding for immunity to specific pathogens, such as powdery mildew, various types of wilts, viruses, and bacterial infections. Additional critical traits include parthenocarpy, which ensures fruit set without pollination, and the ability to control the balance between generative development and sugar accumulation.
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.
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Capsicum annuum L. · Bell pepper
HM.Clause S.A.S.
Capsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
Cucumis melo L. · Melon
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.
Cucumis sativus L. · Cucumber
KAMPE Eike, DE
Capsicum annuum L. · Bell pepper
Nickerson Zwaan, NL
Capsicum annuum L. · Bell pepper
Rijk Zwaan, NL
Cucumis melo L. · Melon
Nunhems B.V.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Spinacia oleracea L. · Spinach
POP VRIEND BV
Begonia x hiemalis Fotsch · Elatior Begonia
Smaal, Andre|Aalsmeer, Netherlands
Solanum lycopersicum L. · Tomato
Clause Vegetable Seeds
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Capsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Chrysanthemum L. · Chrysanthemum
WALTER H. JESSEL, JR. & WILLIAM E. DUFFETT
Chrysanthemum L. · Chrysanthemum
REVECU II B.V.
Cucumis sativus L. · Cucumber
Wing Seed
Capsicum annuum L. · Bell pepper
Clause Semences SA (FR)
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
SYNGENTA SEEDS B.V.
Beta vulgaris Leaf Beet Group · Swiss chard
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (Broccoli Group) · Broccoli
Elsoms Seeds