Posted: 12/11/2012 at 10:43
Roseclear is a good product but it doesn't cure blackspot, it only holds it back. As already said, it does need spraying regularly from the time that the leaves emerge for maximum effect - one or two sprays will do nothing.
Pruning - have a close look at the stems of roses now and cut out any black stains that you see on them - this is the infection waiting to move in next year. Unless you see stains there is no point to pruning roses down to the ground, it won't help. Instead, you should concentrate on removing all fallen leaves, and a good mulch also helps.
Sheila3, roses are very hungry feeders. The fact that the roses were better for a short time after feeding suggests that they need a lot more food and are very hungry.