I am growing scotch bonnet, jalapeno and cayenne pepper plants indoors from seed. The scotch bonnet plants have what looks like white fur growing around the veins on the underside of their leaves. This is accompanied on some leaves by small hard white spots.
This is not visible on all plants, the plants that do show this fur seem to be suffering, some of their leaves have become soft and are rolling up. Neither the fur or the small white specs move when I rub them with my fingers, they remain on the leaf.
Can anyone help me identify the problem?
Update: 04/08/14 20:42
More pictures, the same leaf top and bottom: