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Diseases

Alternaria Leaf Spot of Rapeseed

Brassica napus L.

A fungal disease of rapeseed affecting all above-ground plant organs throughout the entire growing season. It is caused by fungal species of the genus Alternaria, leading to pod deformation and reduced seed quality.

In the reference 49 varieties crop Rapeseed, where this is mentioned in the description.

The primary pathogens of rapeseed Alternaria leaf spot are the fungi Alternaria brassicae, Alternaria brassicicola, and, less frequently, Alternaria alternata and Alternaria raphani. The disease manifests on leaves as circular or angular spots with concentric zonation or a yellow halo. Sunken dark lesions form on stems and pods, leading to premature pod shattering, trident-shaped deformation of the valves, and the shedding of underdeveloped seeds.

Unlike other rapeseed pathogens, no specific resistance genes or stable pathogen races have been described for Alternaria leaf spot. Protection is based on the use of quantitative resistance and field tolerance. Potential defense factors are associated with the expression of genes encoding chitinases and glucanases; however, breeding remains focused on evaluating samples under field conditions.

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.

Umberto KWS

Active

Brassica napus L. · Rapeseed

KWS SAAT SE & CO.KGAA

AT BG HU LT LV RO +1
8 records

Fencer

Active

Brassica napus L. · Rapeseed

Raps GbR

AT BG EE LT LV SK
7 records

Desperado

Active

Brassica napus L. · Rapeseed

Deutsche Saatveredelung AG., Lippstadt DE

AT BG EE HU LT SK
7 records

Aurelia

Active

Brassica napus L. · Rapeseed

Reinhard Hemker

AT HU LT RO SK UA
9 records

Blackmoon

Active

Brassica napus L. · Rapeseed

Ragt 2n, F

AT HU IT LT SK
7 records

Clarus

Active

Brassica napus L. · Rapeseed

Dieter Stelling, Carsten Oertel, Detlef Hauska,

BG EE LT SK UA
7 records

Elvis

Active

Brassica napus L. · Rapeseed

Rustica Prograin Genetique

BG HU IT LT
7 records

Factor KWS

Protection expired

Brassica napus L. · Rapeseed

KWS SAAT SE & CO.KGAA

AT BG HU LT SK
6 records

Herakles

Active

Brassica napus L. · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

AT EE LT SK UA
6 records

KWS Granos

Active

Brassica napus L. · Rapeseed

KWS Saat SE, Einbeck DE

AT HU LV RO
5 records

ES Neptune

Protection expired

Brassica napus L. · Rapeseed

Euralis Semences FR

BG HU RO SK
5 records

ES Amadeo

Active

Brassica napus L. · Rapeseed

Thomas Foubert

HU SK UA
5 records

Ramiro

Terminated

Brassica napus L. · Rapeseed

Raps GbR Saatzucht Lundsgaard

EE IT LT LV
4 records

Memphis

Active

Brassica napus L. · Rapeseed

SAATZUCHT DONAU GESMBH&COKG

IT LT SK UA
4 records

Kasimir

Terminated

Brassica napus L. · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

EE LT LV SE
5 records

Graf

Active

Brassica napus L. · Rapeseed

MONSANTO TECHNOLOGY

AT HU LT SK
4 records

PX141

Active

Brassica napus L. · Rapeseed

PIONEER OVERSEAS CORPORATION

RO SK UA
5 records

Maverick

Active

Brassica napus L. · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

AT EE LT
5 records

ES Mercure

Protection expired

Brassica napus L. · Rapeseed

Euralis Semences FR

BG RO SK
4 records

Hobson

Active

Brassica napus L. · Rapeseed

Limagrain UK

NL
5 records

Astana

Active

Brassica napus L. · Rapeseed

STELLING DIETER

LT SK UA
4 records

PR46H75

Active

Brassica napus L. · Rapeseed

PIONEER OVERSEAS CORPORATION

LT SK UA
5 records

Rabea

Terminated

Brassica napus L. · Rapeseed

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

EE LT LV
4 records

Invigor 2077 CL

Active

Brassica napus L. · Rapeseed

BASF AGRICULTURAL SOLUTIONS US LLC

BG HU LT
3 records