Before treating your roses, I would take a sample of it (a small branch with a bud) to the local garden centre to see if they can diagnose your problem. You don't need to buy anything from them, but they might just be able to pinpoint the true issue and might be able to suggest an organic way of treating it, if it is needed. If you have leaf cutter bees, you will have the most perfectly cut out little circles in the leaves. The advice that you are going to get is to not treat it. The holes look unsightly to some, but will not harm your bush. 

I used to work at a plant nursery, and we were supposed to suggest the chemical applications, if needed of course, and say that the more natural methods are not as effective. I no longer believe that this is always the case, however. I DO prefer doing things naturally. There are too many risks to people and animals with the other chemicals.

Do you have a picture that you can upload so that I can have a look at it?

Overall, I would suggest still going to a nursery and getting them to touch and see the sample and diagnose the problem. It is always best to handle it in person.

I have some ideas, but I really can't give you any real direction unless I can see the plant itself. I did find two sites, with pictures, that you will want to check out.

List of Rose Problems and Diseases

http://www.olyrose.org/pests.htm

There was a wonderful book that the nursery that I worked at had. It was really comprehensive and covered trees and shrubs. I have often wished that I could have got my hands on a copy of it. I heard that it was out of print, but I am sure that I found it or one similar to it years ago online. I can't remember the name of it anymore, but if I can find out what it is again, I will be looking quite hard for it. I loved that book. If I had it, you can be sure that I could have given you some definite maybes.

Joell said
Thank you littlebird, this is the sort of thing I was hoping to find. I have also ordered a set of books by Jerry Baker to keep on hand.

                                 Thanks again for your help.

I really hate to tell you this but many of his so called recipes & remedies don't work.  Like the grits or corn meal for ants was disproved long ago.

Some can be dangerous like the tobacco tea…if strong enough, it is toxic to everything.

If you want answers to your questions…contact your local county extension service office.  Their answers may not be organic but if you stress that is what you want they should be able to find the answers.  Also, don't discount google.