Diseases
Plasmodiophora brassicae
Clubroot is a dangerous fungal disease affecting the root system of cruciferous plants. It manifests in the formation of galls and tumors on the roots, leading to stunted growth, wilting, and significant crop losses.
Mentioned in descriptions 577 varieties reference book.
The disease affects the root system of plants in the Brassicaceae family, causing the formation of characteristic swellings and galls of various sizes. As a result of the impaired absorption function of the roots, the aerial part of the plant lags in growth, leaves turn yellow, and the plants lose turgor and wilt during hot weather, often leading to a lack of heads or the formation of small and loose specimens.
The active development of the pathogen depends on environmental conditions, among which high soil moisture, moderately warm temperatures in the range of 18–25°C, and a slightly acidic pH level are critically important. The pathogen can remain viable in the soil as spores for up to 20 years, utilizing both cultivated plants and weeds as infection reservoirs.
Resistance of varieties is provided by genetic mechanisms that restrict the development of the pathogen in the roots, which allows for harvesting on infested sites. The assessment of resistance in variety trials is carried out through the creation of an artificial infection background, molecular tagging of resistance genes, and analysis of the combining ability of hybrid forms, although protection efficiency may vary depending on the presence of rare physiological races of the pathogen in a specific region.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Brassica rapa L. var. rapa (L.) Thell. · Turnip
STROETMANN SAAT| L. Stroetmann Saat GmbH & Co. KG
Brassica rapa L. subsp. campestris (L.) A. R. Clapham · Field mustard
Germinal Holdings
Brassica rapa L. var. rapa (L.) Thell. · Turnip
Todnem, Kurt, N-4048 Hafrsfjord
Brassica oleracea L. (Red Cabbage Group) · Red cabbage
PIETERPIKZONEN BV
Brassica napus var. napus · Rapeseed
PIONEER OVERSEAS CORPORATION
Brassica rapa L. var. rapa (L.) Thell. · Turnip
Solhatt oekologisk hagebruk AS, 2335 Stange
Brassica oleracea L. (White Cabbage Group) · White cabbage
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica oleracea L. (White Cabbage Group) · White cabbage
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica napus var. napus · Rapeseed
Brassica oleracea L. (Kale Group) · Kale
Brassica oleracea L. (Kale Group) · Kale
Brassica napus var. napus · Rapeseed
Brassica oleracea L. (White Cabbage Group) · White cabbage
Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Brassica rapa L. var. rapa (L.) Thell. · Turnip
Brassica rapa L. subsp. campestris (L.) A. R. Clapham · Field mustard