@Sandsock... my roses have grown quite a bit just in 4 months. It's just early May when I planted them bare root, just about 3-4" of canes. Now they are more like 3 ft tall, not very bushy yet but I guess that will happen in years to come.
I think I have the same problem you describe, although I have not seen these larva you are referring to but almost all the leaves are completely eaten up, but canes/ stems have no issues. So, I am assuming that the leaves will come back up in Spring.
I am wondering what I can use next year to make sure I dont get the same problem again.
Thanks