Diseases
Brassica napus L.
A fungal disease of rapeseed caused by Leptosphaeria maculans and L. biglobosa, characterized by damage to stems, root collars, and seedlings. The disease leads to lodging, premature wilting, and impairment of the plant's vascular system.
In the reference 215 varieties crop Rapeseed, where this is mentioned in the description.
The disease is caused by two fungal species: the highly aggressive Leptosphaeria maculans and the less aggressive L. biglobosa. Symptoms appear at all growth stages: from the emergence of water-soaked spots with pycnidia on cotyledons and hypocotyls, which lead to seedling death, to the formation of necrosis, ulcers, and cracking in the lower part of the stem of adult plants.
Genetic protection against phoma stem canker is based on two types of resistance. Monogenic resistance is provided by specific Rlm genes that recognize pathogen avirulence genes, although their efficacy may decrease due to the high variability of the fungus. Polygenic resistance, which restricts the development of necrosis in petioles and stems, is a more stable mechanism and is often combined with monogenic genes in modern breeding programs.
General information about the subject — on the page Phoma rot.
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 L. · Rapeseed
JOHANNES DIECKMANN
Brassica napus L. · Rapeseed
Euralis Semences, Mondonville FR
Brassica napus L. · Rapeseed
Norddeutsche Pflanzenzucht
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
Monsanto SAS Boissay Toury FR
Brassica napus L. · Rapeseed
DEUTSCHE SAATVEREDELUNG AG
Brassica napus L. · Rapeseed
Lidea France SAS, Lescar FR
Brassica napus L. · Rapeseed
Lidea France SAS, Lescar FR
Brassica napus L. · Rapeseed
NORDDEUTSCHE PFLANZENZUCHT LUBECK
Brassica napus L. · Rapeseed
Syngenta Crop Protection AG
Brassica napus L. · Rapeseed
RAPSODIE
Brassica napus L. · Rapeseed
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Brassica napus L. · Rapeseed
PIONEER OVERSEAS CORPORATION
Brassica napus L. · Rapeseed
SVALOF AB
Brassica napus L. · Rapeseed
Syngenta Seeds
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
Euralis Semences
Brassica napus L. · Rapeseed
Syngenta Participations AG
Brassica napus L. · Rapeseed
SEMENCES CARGILL
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus L. · Rapeseed
SEMENCES CARGILL