Noticed little white things on rose bush

[elleng]

I've 'adopted,' at an abandoned house, couple weeks ago. Didn't look like 'bugs,' more like pieces of feathers. Now, holes in leaves, and 2 flowers I 'harvested' late were dried/shriveled, but not like usual clipped too late blooms.

It was a great bush last year, and wonder if there's anything I can do to help it thrive this year.

Thoughts?

Thanks