Host specificity and virulence variation in populations of lettuce powdery mildew pathogen (Golovinomyces cichoracearum s. str.) from prickly lettuce (Lactuca serriola)

Fifty-four isolates of Golovinomyces cichoracearum (GC) sensu stricto were collected during the period 2008–2010 from natural populations of prickly lettuce (Lactuca serriola) growing in the Czech Republic. Population variation in virulence was assessed with a previously developed race differential...

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