Struggled with it all summer and never really got a handle on it. Used several home remedies which barely worked, then a sulfur-based spray which definitely helped but I think the pm was too entrenched by the time I started the sulfur spray. All my plants survived and are flowering, but have plenty of mildew. And now it's starting to rain here, so I'm sure the plants will die down soon. Next year I will do prophylactic spraying. Is there anything I should do to the tubers after digging them?