FB try CAPTAN ROSE fungus powder it should work. It is about the only thing I have found to cure range rot on horses which is a fungus. It is actually a fungus applicant for rose bushes. You can find it at feed stores or CO-OPs and home and garden outlets like at Walmart. I have used it on my dogs and it helped kill the fungus. My Vet recommended for horses a long time ago.
Roger
Roger
