Antagonistic activity of different yeast spp. against Erwinia amylovora

摘要

Epiphytic yeast-like fungi and yeast strains show antagonistic activity against Erwinia amylovora, thefire blight pathogen, in field experiments and symptom reduction on detached apple blossoms. In thisstudy, sixteen yeast-like fungi and yeast strains including five new isolates from the apple phyllosphere,and seven yeast strains, antagonistic against postharvest diseases, were investigated for their antagonisticpotential against E. amylovora. Results of co-culture experiments, experiments on detached appleblossoms and population studies indicated the best antagonistic effects by the yeast-like fungusAureobasidium pullulans and the two yeast strains Candida sake DSM 70763 and Metschnikowiapulcherrima strain 4 against E. amyolovora. It is not clear, which modes of action are involved. Aftertesting the most effective strain combination in the greenhouse, their antagonistic activity has to beconfirmed in the field.