Here in SoCal, we grew Mme. Isaac Pereire back in the days when we sprayed religiously.
It mildewed, rusted, and taught me about blackspot. Honorine de Brabant was better, but not great -- same for Mme Ernst Calvat. So we declared Bourbons off limits.
Now, I'm growing "New Orleans Cemetery Rose" -- thought to be Pierre de St. Cyr -- a Bourbon. It's doing GREAT.
Which is all to say, I feel your pain and confusion.
