Posted: 11/01/2017 at 18:41
Yes, it's c. persicum. I don't think that's whitefly (too small) but looks like some kind of fungal infection and suspect it has been a bit over-watered and kept somewhere a bit too warm. It shouldn't kill the plant but will affect buds and new leaves so I would be tempted to give it a spray of a fungicide such as Bayer garden fungus fighter. As Dove said, only water them when dry, from the bottom and do keep it somewhere cool.