Diseases
Brassica napus var. napus
A group of rapeseed diseases manifested as necrotic spots of various etiologies, including Alternaria blight, phoma stem canker, cylindrosporiosis, and black rot.
In the reference 31 varieties crop Rapeseed, where this is mentioned in the description.
Alternaria blight of rapeseed, caused by the fungi Alternaria brassicae and A. brassicicola, is characterized by circular spots with concentric zonation and a black velvety coating. Phoma leaf spot, caused by Leptosphaeria maculans and L. biglobosa, manifests as dry gray spots with pycnidia and potential necrosis of the root collar. Resistance to phoma is controlled by Rlm genes, which interact with the pathogen according to the gene-for-gene model.
White leaf spot, or cylindrosporiosis, is caused by the fungus Cylindrosporium concentricum and appears as whitish or gray spots with a loose coating. Bacterial leaf spot, caused by Xanthomonas campestris pv. campestris, is distinguished by V-shaped necrotic spots with a chlorotic halo and a water-soaked appearance of the tissues. For Alternaria and bacterial pathogens, the presence of virulent races has been described, which necessitates consideration of regional specificity when selecting resistant varieties.
General information about the subject — on the page Leaf spot diseases.
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
Norddeutsche Pflanzenzucht Hans Georg Lembke KG,DE
Brassica napus var. napus · Rapeseed
Dieter Stelling, Jurgen Noack, Martin Frauen,
Brassica napus var. napus · Rapeseed
Gunhild Leckband Dieter Stelling
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
Gunhild Leckband Dieter Stelling
Brassica napus var. napus · Rapeseed
Lidea France SAS, FR
Brassica napus var. napus · Rapeseed
LIDEA FRANCE SAS
Brassica napus var. napus · Rapeseed
Andreas Gertz
Brassica napus var. napus · Rapeseed
RAGT 2n, FR
Brassica napus var. napus · Rapeseed
RAGT 2n, FR
Brassica napus var. napus · Rapeseed
KWS SAAT SE&CO.KGaA, DE
Brassica napus var. napus · Rapeseed
KWS MOMONT RECHERCHE S.A.R.L
Brassica napus var. napus · Rapeseed
DEUTSCHE SAATVEREDELUNG AG
Brassica napus var. napus · Rapeseed
M A Pickford
Brassica napus var. napus · Rapeseed
LIMAGRAIN EUROPE
Brassica napus var. napus · Rapeseed
PLANT BREEDING INTERNATIONAL CAMBRIDGE
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
M A Pickford
Brassica napus var. napus · Rapeseed
LIMAGRAIN EUROPE
Brassica napus var. napus · Rapeseed
Reinhard Hemker
Brassica napus var. napus · Rapeseed
Monsanto Technology LLC (US)/Norddeutsche Pflanzenzucht Hans-Georg Lembke KG (DE)