I was going to suggest rust, glad we figured out what it might be. And glad you're getting something to fix it. Hope your plant survives, and makes a recovery.
Would do light testing with it and use it in low concentrations on plants you would be 'ok' with taking a nose dive before going full blown with it on all your plants. While it might state it will combat the same diseases and what not, the active ingredients may be vastly different (in this case I believe they are) and unless you confirm those AI to be safe for your plants first, things may take a turn for the worse. Not all pesticides/fungicides are equal, especially as it relates to CPs; I try to avoid them at all cost cause I'm overly paranoid and cautious. Hopefully, someone has tried the specific brands/AI you are looking at using and can help advise you on its affects. Good luck.
Did some quick searching and thought the following might be helpful:
Bayer NATRIA insect disease and mite control
Last edited by zlookup; 03-31-2012 at 07:04 AM. Reason: updated