There are two stages of growth. The fuzzy one is a larval stage and the smoother one is a pupa. I saw lots of beetles too, but I couldn't manage to get a picture. They are very round and red at first, but turn orange or yellow with lots of spots.
I killed every one I found and trimmed the rose bush back almost entirely, to remove anything that looked damaged or diseased. There was also this sticky residue with black specks all over. I suspect this is leftovers from the larvae sacks after the metamorphosis into a beetle.
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