David, I have just been out to peer even more closely at my manky roses. You are right. There are tiny holes at the base of the bud.
When I opened the bud, I could see tiny insects.
They are too small to make out any detail.
I must admit I didn't expect insects. Why would they only be on just the one rose?
Because I have such a tiny garden, all my roses are close to each other. The Duchess has had this problem since she first bloomed, but none of the other roses have.
Any ideas what I can do about it?
Daisy