Is Decree and Heritage still the chemicals of choice at this stage (date) for Powdery Mildew? Would Pipron also work?

Many growers do use Heritage and Decree at this stage of the crop because both chemicals leave very little spotting or residue on the bracts. Pipron may be phytotoxic to certain varieties and had been known to cause spotting in certain environments. The label recommends testing an application on a small number of tests plants first.