The differences in the virulence of the crown rust populations of Puccinia coronata Corda var. coronata f. sp. festucae in Czechoslovakia were studied by field infestation of selected clones of Festuca pratensis Huds. at 8 sites under various environmental conditions in 1978–1979. The results, complemented by greenhouse tests on the offspring of the clones, confirmed the existence of at least two rust populations with different virulence levels. This underlines the necessity of testing resistant plant varieties at different localities or using mixed populations of the rust in breeding for resistance.
Cagaš B. (1984): Unterschiedliche Virulenz der Kronenrostpopulationen (Puccinia coronata Corda var. coronata f. sp. festucae) in der ČSSR. – Česká Mykologie 38(1): 31–38.
