Variety traits
Brassica napus var. napus
The complex ability of winter rapeseed to withstand adverse overwintering conditions, including frosts, thaws, and temperature fluctuations. It determines crop survival and the necessity for spring reseeding.
In the reference 81 varieties crop Rapeseed, where this is mentioned in the description.
To assess the winter hardiness of rapeseed, a visual inspection of the root system is conducted; a healthy root should remain white without brown spots. In field conditions, a critical plant density threshold is considered to be 10 plants per square meter, below which crops must be reseeded, while the optimal density is 25–50 plants per square meter.
Rapeseed is capable of withstanding frosts down to –15…–20 °C without snow cover and down to –30…–35 °C with it. The optimal state for overwintering is considered to be a plant in the rosette phase with 6–8 leaves, a root collar diameter of 8–10 mm, and a growing point located at or below the soil surface.
The risk of crop failure increases when plants become overgrown, as the growing point is elevated above the soil surface, making them vulnerable to temperatures below –8…–10 °C. To increase resistance, hardening at temperatures near freezing is necessary, which promotes the accumulation of soluble substances in the cells.
General information about the subject — on the page Winter hardiness.
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.
Brassica napus var. napus · Rapeseed
RAGT 2n
Brassica napus var. napus · Rapeseed
Milovac Zeljko, Terzic Sreten, Radic Velimir, Marjanovic Jeromela Ana,
Brassica napus var. napus · Rapeseed
Instytut Hodowli i Aklimatyzacji Roslin Panstwowy Instytut Badawczy
Brassica napus var. napus · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus var. napus · Rapeseed
Saatzucht Donau GmbH & Co.KG
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen / Dr. Werner Paulmann / Juergen Noack / Dr. Valentina Volovik
Brassica napus var. napus · Rapeseed
SYNGENTA SEEDS AG| Syngenta Seeds AG
Brassica napus var. napus · Rapeseed
Reinhard Hemker
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus var. napus · Rapeseed
PIONEER OVERSEAS CORPORATION
Brassica napus var. napus · Rapeseed
SELGEN A.S
Brassica napus var. napus · Rapeseed
Rapsodie s.a.s.
Brassica napus var. napus · Rapeseed
DEUTSCHE SAATVEREDELUNG AG
Brassica napus var. napus · Rapeseed
VOLOVIK VALENTINA TIMOFEEVNA / NOVOSELOV YuRIJ KONSTANTINOVICh / RUDOMAN VERA VLADIMIROVNA / LUKOMETS VYaChESLAV MIHAJLOVICh / GORLOV SERGEJ LEONIDOVICh
Brassica napus var. napus · Rapeseed
Ing. Piet Lammers
Brassica napus var. napus · Rapeseed
Monsanto Agriculture France SAS (FR)
Brassica napus var. napus · Rapeseed
New Zealand Institute for Crop and Food Research Ltd
Brassica napus var. napus · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus var. napus · Rapeseed
Frank Houben c/o Joordens' Zaadhandel B.V.
Brassica napus var. napus · Rapeseed
SELGEN A.S
Brassica napus var. napus · Rapeseed
PIONEER OVERSEAS CORPORATION
Brassica napus var. napus · Rapeseed
Claude Sciaccaluga, Jean-Pierre Despeghel,
Brassica napus var. napus · Rapeseed
BARENBRUG H.J.M.| H.J.M. Barenbrug
Brassica napus var. napus · Rapeseed
Syngenta Crop Protection AG