Skip to content
agronom.cc cultivar database

Diseases

Alternaria blight of oilseed rape

Brassica napus var. napus

A fungal disease of oilseed rape caused by Alternaria brassicae and Alternaria brassicicola species, affecting all aerial plant parts throughout the entire growing season.

In the reference 108 varieties crop Rapeseed, where this is mentioned in the description.

The primary pathogens of Alternaria blight on oilseed rape are the fungi Alternaria brassicae, which mainly cause grey leaf spot, and Alternaria brassicicola, which induce dark leaf spot. A. alternata, A. raphani, A. tenuissima, and A. arborescens may also be found in crops.

On leaves, the disease manifests as round or angular spots with a distinct halo, with A. brassicae often forming spots with a zonal "target-like" pattern. On stems and pods, sunken ulcerative lesions form, which become covered with a velvety layer of sporulation under humid conditions. Severe infection of pods leads to their premature shattering, known as the "trident" effect, resulting in shriveled seeds or their complete absence.

Specific monogenic resistance genes to this disease in oilseed rape have not been described to date. Resistance is considered a quantitative trait evaluated under field conditions, and the use of molecular markers is of an auxiliary nature for assessing overall genetic polymorphism.

General information about the subject — on the page Alternaria blight.

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.

Hybrirock

Active

Brassica napus var. napus · Rapeseed

SARL ADRIEN MOMONT ET FILS, FR

FR HR PL UA
13 records

ES Mercure

Application submitted

Brassica napus var. napus · Rapeseed

Euralis Semences FR

CZ FR HR PL
11 records

Bonanza

Active

Brassica napus var. napus · Rapeseed

Serasem, FR

CZ FR PL UA
10 records

NK Caravel

Active

Brassica napus var. napus · Rapeseed

Syngenta Crop Protection AG, Seeds Division, CH

CZ DK HR
9 records

RGT Paradizze

Active

Brassica napus var. napus · Rapeseed

RAGT 2n, FR

DE FR PL UA
7 records

DK Exquisite

Active

Brassica napus var. napus · Rapeseed

MONSANTO TECHNOLOGY

CZ FR PL UA
10 records

Graf

Active

Brassica napus var. napus · Rapeseed

Tomasz Pakos, Jean-Pierre Despigel,

CZ PL UA
7 records

Crazy CL

Active

Brassica napus var. napus · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

DE PL UA
10 records

Cezanne

Active

Brassica napus var. napus · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

DK FR UA
7 records

Mika

Terminated

Brassica napus var. napus · Rapeseed

KWS| KWS SAAT AG

DE DK PL
7 records

KWS Vamos

Active

Brassica napus var. napus · Rapeseed

KWS SAAT SE & CO.KGAA

DE DK UA
10 records

Excalibur

Active

Brassica napus var. napus · Rapeseed

Monsanto Technology LLC (SAD)

DK HR SE
6 records

ES Danube

Active

Brassica napus var. napus · Rapeseed

Euralis Semences FR

FR HR
6 records

ES Navigo

Active

Brassica napus var. napus · Rapeseed

LIDEA FRANCE SAS

FR
6 records

Gefest KWS

Active

Brassica napus var. napus · Rapeseed

KWS SAAT SE & CO.KGAA

DE
5 records

Crocant

Active

Brassica napus var. napus · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

PL UA
5 records

LG Corsica CL

Active

Brassica napus var. napus · Rapeseed

Limagrain Europe S.A.S

ES UA
6 records

Invigor 400 CL PS

Active

Brassica napus var. napus · Rapeseed

BASF AGRICULTURAL SOLUTIONS US LLC

DE PL
6 records

Casoar

Protection expired

Brassica napus var. napus · Rapeseed

MONSANTO TECHNOLOGY

DK PL
6 records

DK Seax

Active

Brassica napus var. napus · Rapeseed

Nelly Guguin, Jean-Pierre Despeghel,

UA
5 records

Severino KWS

Active

Brassica napus var. napus · Rapeseed

KWS Saat AG, DE

FR UA
7 records

Nymphea

Active

Brassica napus var. napus · Rapeseed

MAS Seeds,FR

FR UA
6 records

LID Tebo

Active

Brassica napus var. napus · Rapeseed

LIDEA FRANCE SAS

FR PL
6 records

LID Sandro

Active

Brassica napus var. napus · Rapeseed

LIDEA FRANCE SAS

CZ PL
4 records