In the above link from 2015 MSU recommends Indar (fenbuconazole) or Vanguard (Cyprodinil) for BR. But I'm thinking they may be available only to commercial growers? I'm not sure about that though, maybe it was an overall price thing that's been the hold-up with my never obtaining any...
But it's been my understanding for awhile now, that while Immunox (Myclobutanil) shows BR as one of the things it combats, that it's actually not all that effective against it.
Not knocking Immunox BTW, I use it all the time on my Apples - it's just that it's been my understanding that it's less effective on BR in stone fruits than maybe some other products.
I recall back on GW when I was struggling with BR on my ER in like 2010, I was steered toward Montrey Fungi Fighter by Alan, and when I could not get it quickly enough, I was able to find the same active ingredient (Propiconazole) in Bonide Infuse. And the bottle I'm now using is from FertiLome, and I think Hi-Yield makes something too.
But the advice I got back then was priceless, and I was able to rescue my trees crop that year. Since then, I have tried to stay diligent about spraying against BR every year. But..., I still have BR crop up a little bit from time to time. I don't know if it's a lack of total coverage due to the tree being so large, or if it's timing. But I know that when and if I see a couple green cherries turning brown (even after spraying earlier) that I can hit it again and and it'll stop it. The label indicates four applications maximum though.
So I've been making my initial spray at blossom, but according to the MSU link they recommend at popcorn and one week later.
I plan on doing that next year just to see if that's the ticket.
I will say that my ER seems to be more prone to BR than my CJ's have been.
Good luck Vincent, hope you get a handle on this.