If you don't get an answer you might try on the rose organic forum and see about over on that area. Just a thought... Leslie

The Cornell Formula and its various modifications. Some people have also used neem oil and neem-based products. The other choice is to grow only disease resistant varieties.

Depending on the rose and your locations, no guarantee that they will be totally successful. If you do some reading up over on the Organic Gardening Forum, especially the FAQ, you'll get more information on how healthy soil helps in disease prevention.

Greenlight Rose Spray is neem oil and the label says it will prevent blackspot, as well as smother insects and thier eggs. But if you "show your roses" it will not come off the leaves very good. That is why I don't use it.

If there was something "organic" that worked really well wouldn't we all be using it? When neem first came out I used it and found it to be lacking. It couldn't hold up under our hot humid and just plain wet Florida summers. What I have found to be the case is that the less toxic (bio-friendly) the more specific the target pets...it only works on one thing.

I saw a organic rose spray advertised call Rose Pharm. I don't know what's in it. It's for disease and insects.

Rose Pharm. I'm trying to figure out which is supposed to be the "fungicide", either the peppermint or rosemary oil, maybe both. Bet the aphids will like the cherry juice, I would... Ah, but is the cherry juice they use certified organic? Hmmmm?