This article (see link) reviews the state of grape downy mildew resistance in Georgia as of the close of the 2018 season.  Field failures when using strobilurin (QoI) fungicides have been confirmed in Georgia for both research and multiple commercial vineyard sites.  Of major import, efficacy of several downy mildew materials have been compared, and we have confirmed rankings of several of these.  This information will be particularly important as you plan for the 2019 vineyard production cycle.

Downy Mildew Resistance in Georgia 2018

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