The little white lumpy bumpy looking things kinda look like leaf galls, but I cant tell for sure. There are several hundred insects (wasps, moths, sawflies...) that can cause galls. Galls are basically just deformations on leaves or stems which are caused when the bug lays eggs etc. Normally they are just ugly but the hatching insects may go munching (depending what they are).
Dormant spraying can help the problem before next year, but there's not much you can do right now until you identify the culprit, and are willing to use insecticides appropriate for the situation....
That is IF those are galls that I am seeing!