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Diseases

Rapeseed Leaf Spots

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.

Sources8

Varieties of Rapeseed mentioned in the description

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.

Picto

Active

Brassica napus var. napus · Rapeseed

KWS MOMONT RECHERCHE S.A.R.L

DE
5 records

Palmedor

Active

Brassica napus var. napus · Rapeseed

Serasem S.A.S.

FR
5 records

Nikita

Active

Brassica napus var. napus · Rapeseed

Limagrain Europe S.A.S

DE
5 records

KWS Virtuos

Active

Brassica napus var. napus · Rapeseed

KWS SAAT SE&CO.KGaA, DE

FR
3 records

Django

Active

Brassica napus var. napus · Rapeseed

KWS MOMONT RECHERCHE S.A.R.L

DK
7 records

DK Pledge

Active

Brassica napus var. napus · Rapeseed

Monsanto Technology LLC, US

FR
3 records

Bosman

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
4 records

Acacia

Active

Brassica napus var. napus · Rapeseed

Limagrain Europe S.A.S

DE
5 records

Berny

Active

Brassica napus var. napus · Rapeseed

Saatzucht Donau GmbH & Co.KG

UA
5 records

KWS Diabolos CL

Terminated

Brassica napus var. napus · Rapeseed

KWS MOMONT RECHERCHE SARL, FR

FR
3 records

KWS Meros

Withdrawn

Brassica napus var. napus · Rapeseed

KWS SAAT SE&CO.KGaA, DE

FR PL
2 records

Bazyl

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Smolice Sp.z o.o Grupa IHAR

PL
3 records

Uniwersum

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Kwazar

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Hevelius

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Temple

Active

Brassica napus var. napus · Rapeseed

Elsoms Seeds

2 records

PT261

Active

Brassica napus var. napus · Rapeseed

PIONEER OVERSEAS CORPORATION

2 records

Imola

Terminated

Brassica napus var. napus · Rapeseed

KWS UK LTD

2 records

Elgar

Active

Brassica napus var. napus · Rapeseed

SYNGENTA WINTER OILSEED AB

3 records

Crios

Active

Brassica napus var. napus · Rapeseed

DE
4 records

Eraton

Active

Brassica napus var. napus · Rapeseed

DK
4 records

Wendie

Active

Brassica napus var. napus · Rapeseed

IT UA
3 records

Orelia

Terminated

Brassica napus var. napus · Rapeseed

IT
2 records

Dirigent

Active

Brassica napus var. napus · Rapeseed

DE
2 records