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Managing Powdery Mildew of Cherry in Washington Orchards and Nurseries with Spray Oils

G. G. Grove, R. J. Boal, L. H. Bennett

28 July 2000


Orchard mildew management programs that utilize oils, DMI and strobilurin fungicides to control powdery mildew of sweet cherry have been developed for eastern Washington. A growth stage, calendar-based program provides excellent disease control, utilizes three fungicidal modes of action, and minimizes oil-induced fruit and foliar phytotoxicity. A second approach that utilizes oils in a temperature-based disease forecasting system provides excellent disease control with fewer fungicide applications.


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