Clubroot, a persistent threat to Swedish oilseed rape production

摘要: AbstractBrassica oilseed crops have been grown by Swedish farmers since the early 1940s. Years of high market prices for vegetable oils resulted in intensive cultivation Brassica oilseeds various regions, which led to problems with soilborne pathogens including Plasmodiophora brassicae. This pathogen most likely was present soils prior boom after World War II. Currently, reports clubroot disease outbreaks Sweden are frequent, a trend increasing incidence. Since 2012, DNA-based soil analyses presence P. brassicae offered order improve their crop rotation planning. Other means limiting damage caused also presently under study, such as effects boron or different sources nitrogen. The distribution and identification pathotypes/races could so far not be verified. To aid race diagnostics, resistance breeding efforts, understanding ...