For tree fruits, the new growth is perfect for "wiping". 
Wiping is where you go out to the tree.  Where the new
growth is located, take your hand with a grove, and "wipe"
off the new growth from pruning cuts made this past
winter.  With the new growth only 2-3 inches long, with a
gloved hand, the new growth can be removed or "wiped"
from where it is growing.  By wiping, there is very little
growth since you are not cutting the tissue.  Plus little you
are a head for next winter, two WINS!!!  Apples have
 a lot of powdery mildew, just prune it out.