Technical Report

 

Distribution and Frequency of Benomyl, Vinclozolin, and Benomyl/Vinclozolin Strains of Botrytis cinerea in Oregon Vineyards Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/bc386r24p

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  • Gray mold of grape, caused by Botrytis cinerea, can be a serious problem in Oregon vineyards. Disease control has been achieved primarily through the application of foliar fungicides. For a time, the fungicide benomyl provided outstanding control of this disease; however, by the late-1970's, strains of B. cinerea resistant to benomyl were detected throughout the Willamette Valley. This fungicide no longer provides control. Growers now use the dicarboximide fungicides vinclozolin (Ronilan) and iprodione (Rovral) for mold control. Widespread resistance of B. cinerea to the dicarboximides would leave viticulturists with new alternatives for control of gray mold.
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