I have purchased a Semi Dwarf Gala apple…
Upon purchasing the tree looked great… however in NY during the first week I brought the tree home the weather was 3 days of rain, night temps in the 40s and 70s-80s during the day. I have since seen my apple tree change and look sickly… the leaves have curled up… all new growth looks grey and shriveled and falls off… and they feel very crunchy with some black spots…
Did you plant or repot the tree?
If yes, consider that the roots have been disrupted especialy if you loosened the rootball during the process.
This causes some shock to the root system and if so it has an effect on the roots’ ability to uptake water etc.
Should be temporary.
Mike
It could just be heat stress. Apples will roll their leaves to conserve water. Some cultivars do this more than others. It’s also possible that you have potato leafhoppers. The young of the leafhoppers feed on the leaves and cause the leaves to curl. The young look like tiny bright green lines and they walk sideways on the leaves. I would look on the back of the leaves and see if any are present. There are also other species of leafhopper that can cause damage. Here is a link on leafhoppers.
http://www.omafra.gov.on.ca/IPM/english/apples/insects/potato-leafhopper.html
I am not sure about the black spots. I would look for spots that not that old and which still have some color which will make the issue easier to identify. You could post more pics to this forum. Since you’re new to forum you may be limited to one pic per post. The grey new growth maybe powdery mildew and again more pictures would help.
The tree loses a lot of root mass during transplanting. You need to compensate by pruning the top growth at the same time to bring it into proportion.
You’ll want to take into account the size of the tree and your plans for future pruning. Most apples are on dwarfing rootstocks. Most growers want trees they can handle without ladders. Most efficient use of sun in a backyard situation is a “central leader” configuration. Given these constraints, after transplanting, it is wise to cut the tree back to the height of your belt. This will cause the first tier of lateral branches to be set about three feet off the ground (out of the reach of púcas).
This first pruning cut not only sets the stage for the future conformation of the tree but also gives the tree a little bit of a breather to toughen up after the initial shock of transplantation.
Thank you !! It already looks a little better today.
I’m so new With apple trees… is it okay to prune it back now in June? Would I have to prune it again I’m fall?
If it is looking bettter LEAVE IT ALONE. Let it settle in.
Best advice at this time "HURRY UP AND RELAX"
Mike
Ditto. Ditto.
I’m going to piggyback on @Xxrainaxx apple thread.
I found these on my Goldrush this week. All else looks very good . . . but what are these and should I be concerned?
Thank you very much I will definitely leave it alone lol!! I think it’s just super stressed from being put into the ground like you guys said it looks a little better today and it’s not getting worse so I will just leave it! 
