Diseases
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.
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
Sandrine LEGROS
Brassica napus var. napus · Rapeseed
Andreas Gertz
Brassica napus var. napus · Rapeseed
Nelly Guguin, Jean-Pierre Despigel,
Brassica napus var. napus · Rapeseed
MONSANTO TECHNOLOGY
Brassica napus var. napus · Rapeseed
JOHANNES DIECKMANN
Brassica napus var. napus · Rapeseed
KWS SAAT SE&CO.KGaA, DE
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
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus var. napus · Rapeseed
MAS Seeds,FR
Brassica napus var. napus · Rapeseed
KWS, D
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus var. napus · Rapeseed
Dirk Decherf
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
RAGT 2n
Brassica napus var. napus · Rapeseed
Limagrain Europe S.A.S
Brassica napus var. napus · Rapeseed
OSEVA PRO Ltd.
Brassica napus var. napus · Rapeseed
SEMPRA PRAHA A S
Brassica napus var. napus · Rapeseed
OSEVA vývoj a výzkum s.r.o. (CZ)/SELGEN, a.s. (CZ)/SEMPRA PRAHA a.s. (CZ)/Národní centrum zemědělského a potravinářského výzkumu, v. v. i. (CZ)/Agritec Plant Research s.r.o. (CZ)
Brassica napus var. napus · Rapeseed
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus var. napus · Rapeseed
Monsanto Technology LLC, US
Brassica napus var. napus · Rapeseed
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR