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Resistance to Dodine in Populations of Venturia inaequalis in Quebec, Canada

O. Carisse and T. Jobin

June 2010


Dodine was introduced in the USA and Canada in the early 1960s for the control of apple scab. Following control failure, growers stopped using dodine more than 30 years ago, but persistent resistance to the fungicide has been suspected in V. inaequalis populations. The dodine sensitivity was determined for two populations that were not exposed to dodine for at least 30 years − a wild type population and a population constructed with isolates collected in orchards managed for apple scab.


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