For over a month now, I have noticed random holes in some of my Rose bush buds. I blamed the ants and other tiny insects. This afternoon I found a pinkish worm burrowing and eating its way into a bud (using the petals as food source). Due to their size and the color of the buds, the larvae can be hard to notice too.
When next you’re working around your Garden and you see a bunch of holes on your Rose buds (or any other bud), simply hand pick the worm and dispose of it.
I found an interesting blog post which talks more about the life history of this Glistening Caerulean. Click here.