White crusty deposits on radish

[vaca]

Hello,

I've been growing 3 different varieties of radish and one of them is full of white crusty deposits on the underside of their leaves. This over the past 2 weeks or so has pretty much destroyed the leaves and left me with a rather pitiful harvest of radishes.

Could these be eggs of some kind ??? there were none on the top side of the leaves, just the bottom.

Thanks,
vaca

[RSJK]

Vacca,
          I think it could be what they call White Blister on your radishes, it is a Problem  that affects the brassica family.