Diseases
Brassica napus var. napus
A fungal disease of oilseed rape caused by Leptosphaeria maculans and L. biglobosa, affecting all plant organs and capable of causing crop failure due to the destruction of the root collar.
In the reference 529 varieties crop Rapeseed, where this is mentioned in the description.
The pathogens of the disease are two fungal species: the more aggressive Leptosphaeria maculans and the less aggressive Leptosphaeria biglobosa, whose anamorph stage is known as Phoma lingam. The pathogen exhibits high genetic variability, manifesting in the presence of various pathotypes that differ in virulence.
The disease affects oilseed rape at all growth stages. Light spots with pycnidia appear on seedlings, and gray-brown spots with a dark margin appear on leaves. The most dangerous symptom is the formation of necrotic cankers at the stem base, which lead to tissue cracking, impaired nutrient uptake, and plant lodging.
Resistance of oilseed rape to Phoma stem canker includes qualitative resistance based on specific Rlm genes (e.g., Rlm4, Rlm7) that interact with the pathogen's avirulence genes. Quantitative polygenic resistance is also employed, aimed at slowing down the spread of infection in stem tissues and petioles.
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 var. napus · Rapeseed
Deutsche Saatveredelung AG - DSV (DE)
Brassica napus var. napus · Rapeseed
Lidea France S.A.S
Brassica napus var. napus · Rapeseed
CAUSSADE| Caussade Semences (Societe Anonyme a Directoire)
Brassica napus var. napus · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus var. napus · Rapeseed
Gunhild Leckband Dieter Stelling
Brassica napus var. napus · Rapeseed
Nelly Guguin, Jean-Pierre Despeghel,
Brassica napus var. napus · Rapeseed
Almut Hampe
Brassica napus var. napus · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
KWS Saat AG, DE
Brassica napus var. napus · Rapeseed
RAGT 2n, FR
Brassica napus var. napus · Rapeseed
MAS Seeds,FR
Brassica napus var. napus · Rapeseed
Syngenta Crop Protection AG, Seeds Division, CH
Brassica napus var. napus · Rapeseed
Lidea France SAS, FR
Brassica napus var. napus · Rapeseed
LIDEA FRANCE SAS
Brassica napus var. napus · Rapeseed
MAS Seeds,FR
Brassica napus var. napus · Rapeseed
KWS SAAT SE&CO.KGaA, DE
Brassica napus var. napus · Rapeseed
LIDEA FRANCE SAS
Brassica napus var. napus · Rapeseed
Marie-Aude Vanhersecke
Brassica napus var. napus · Rapeseed
DEUTSCHE SAATVEREDELUNG AG
Brassica napus var. napus · Rapeseed
Sandrine LEGROS
Brassica napus var. napus · Rapeseed
Dirk Decherf
Brassica napus var. napus · Rapeseed
Jutta Kaiser, Jutta Kaiser,
Brassica napus var. napus · Rapeseed
LIDEA FRANCE SAS