The Black Spot

My granddaughter loves Treasure Island and Foloh likes to tease her about the Black Spot. Well my favourite rose bush has the black spot. . It had it last year and I carefully picked off the leaves and burnt them . I also bought stuff to treat it and I thought I had beaten it as the leaves were lovely and green but yesterday I noticed it was back.
My neighbour’s roses have it too and they have rust so I will have to watch out for that arriving.