Well, that stuff has been killing my roses, Red Tips (gone now) and any thing it can get to. I have two dogs and will NOT use weed killer or anything poison where they might come in contact with it... any help? I know, I shouldn't plant any more roses LOL!
I am new to this group, so I apologize for the late response. Perhaps what I have to say will help you in 2010.
In a quick check of the Spray-n-Grow catalog, I found three fungicides, all of which are environmentally responsible and safe for both you and your dogs. I can't vouch for their effectiveness on black spot, which is a particularly stubborn fungus. However, I think one or more of them is worth a try.