Fungicide applications were reduced to the minimum necessary to maintain plant viability. N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide (Captan 80WDG) was applied at recommended rates at the following phenological stages [identified according to the modified Eichhorn–Lorenz scale (Coombe 1995)] during 2011 through 2013: stage 12 (1.68 kg/ha, late May), stage 17–18 (2.24 kg/ha, early June), stage 26 (2.80 kg/ha, mid-June), stage 29 (2.80 kg/ha, late June) and stage 31 (2.80 kg/ha, mid-July). Potassium phosphite (ProPhyt, Helena Chemical Company, Collierville, TN, USA) was applied for control of downy mildew at a rate of 2.35 kg/ha of phosphorous acid equivalent at stages 32 and 34 (early and mid-August, respectively) in 2011 and 2012.