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Streptomycin Resistance of Erwinia amylovora Isolated from Apple (Malus domesticus) in Utah

C. Nischwitz and C. Dhiman

October 2013


Fire blight, caused by the bacterium Erwinia amylovora, causes devastating losses in multiple fruit and ornamental crops worldwide. Currently, the only effective management strategy is the application of streptomycin. In 2006, isolates resistant to streptomycin were detected in an apple orchard in central Utah for the first time. To determine the distribution of resistant isolates and the level of resistance, isolates of E. amylovora were collected from apple trees across the state and tested for resistance to streptomycin.


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