Hey I'm new to growing fruit but I bought some Gala Apple Trees and planted them in my back yard a few months ago. They were looking great at first and one even has some fruit which made me pretty happy for the first year but now they are getting this yellow leaf thing and I don't know what it is.
I took some detailed pictures because it doesn't resemble anything I've seen online just searching for it. I read a similar problem on here and checked for all the beginner mistakes, water, mulch, low-planting. I think I'm good there but maybe wrong.