Blackleg in Swedish winter oilseed rape, causal pathogens, and race identification of Plenodomus lingam
This study characterizes the geographic and seasonal prevalence of *Plenodomus lingam* and *P. biglobosus* in Swedish winter oilseed rape and reveals that while host resistance genes *LepR1* and *LepR2* remain effective, the high frequency of *P. lingam* isolates virulent on *Rlm7* signals an urgent need for ongoing monitoring to prevent resistance breakdown.