Rose Bushes Have Green Balls Which Turn Gray

Question From: Hastings, Minnesota, United States
Q: My rose bushes have, at first green balls on them... Then they turn gray. Is the bush diseased???

A: Sounds like a disease, but not one I am familiar with, nor have I been able to find mention of such in my research. I suggest you take a sample (do put it in a plastic bag) to a local independent nursery such as Bachmans for a first hand ID. Best And Happy Yardening, Nancy