Can I delete individual photos off of my sd card in iPhoto 9?

Hi, I was wondering if anybody can tell me if we're able to delete photos that have been deleted off of iPhoto, but are still on the SD Card. They're bad photos, and it's much easier to be able to delete it off of iPhoto, because it tells you which ones aren't imported. If this isn't a feature, then I hope that Apple will add it in future releases. Kind of disappointing that it hasn't been added if that be the case. Any help would be much appreciated, Thanks!