Abstract
In a four-year survey of strawberry nursery plants, 340 Botrytis isolates were collected and examined for fungicide resistance. High percentages of isolates with resistance to members of all fungicide classes registered on strawberries in Germany were found, i.e. trifloxystrobin (90.3%), boscalid (53.8%), cyprodinil (41.5%), fludioxonil (28.2%) and fenhexamid (15.6%). Of these isolates, 10.3% possessed multiple resistance to all compounds. At 5.0%, resistance to the recently registered fungicide fluopyram was low. Dutch nursery material harboured significantly higher proportions of isolates with resistance to any or all fungicides than plants produced in Germany. These data point to nursery plants as a possible route of introducing fungicide-resistant Botrytis strains into commercial strawberry fields.
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Acknowledgements
This research was supported by a grant from the German Ministry of Agriculture BMEL (grant number 2814705811). We are grateful to Stefanie Kutz for technical assistance.
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Weber, R.W.S., Entrop, AP. Recovery of fungicide-resistant Botrytis isolates from strawberry nursery plants. Eur J Plant Pathol 149, 739–742 (2017). https://doi.org/10.1007/s10658-017-1206-9
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DOI: https://doi.org/10.1007/s10658-017-1206-9