We planted three apple trees this past spring, and keeping in mind that they seem, by all accounts, to be doing awesome, they likewise appear to have "acquired" the parasite that the majority of the maple trees have. I haven't done any testing to figure out what it is particularly. I simply know it's contagious and it would seem that yuck. My hunch is that it's a rust ailment however I don't know whether rust ailments are regular for maples, and they appear to be identical. Be that as it may, I stray… I don't trust it will execute the trees, yet since the apple trees are still new, it might be somewhat harder for them to adjust.