Are there any home remedys to killing black spots on roses?

Question:Roses are dying from black spots, What can we do as far as home experiments that work?

Answers:
You can't remove black spot once it appears. You can only prevent it from spreading and affecting other leaves.

There is a theory that black spot can only grow in a very narrow ph range. You can make your own spray - either baking soda and water, or 1/2 milk & 1/2 water, and spray the plant with that. It chances the ph on the surface of the leaf and makes it an inhospitable environment for the spread of both black spot and powdery mildew.

You have to spray once a week, and after every rain, though...