If in a protectant situation then prothioconazole is the most effective of the azoles against this disease, an application of Fandango (prothioconazole + fluoxastrobin) or Siltra Xpro (prothioconazole + bixafen) as part of your usual disease control programme should take care of all but the most severe infections. Always consider the addition of a specific mildewcide throughout the programme in cases of established infection.