Different things actually.
Black spot on roses, use any fungicide sold for the purpose, Rose Clear? (Personally I would just dig out the roses and plant something nice instead).
The Apples have probably got Scab. Since spraying edible stuff with poison is not a good idea, I use Copper sulphate (Bordaeux Mixture is similar if you cannot find c.s.). Spray at fortnightly intervals from when the leaves appear until the flowers are open, then give it a rest. Spray again after the fruit has formed and stop a couple of weeks before the fruit is ready. If the problem stops, then stop spraying. Collect up and burn or bin any really badly affected leaves.

Dont give up on your roses give them a good prune this spring and spray them when and often as the instructions say and keep the area underneath free from dropped leaves etc. Also feed/mulchg them and give each one a tablespoon of Epsom salts around the base if the leaves are yellow.