What is wrong with this apple tree?
Hello, our client brought in some clippings from his apple tree. He said some of the leaves have these brown spots and they are curling and withering. The tree is about 8 year old, 8-10 feet tall and is located in his backyard. This is the only tree that has the brown spots.
Alpena County Michigan
For home apple grower sprays where you need to protect against insects, and diseases I recommend this short resource from the University of Kentucky https://plantpathology.ca.uky.edu/files/ppfs-fr-t-18.pdf
Here is a good resource on home fruit tree care.
They also have a good resource for pest control.https://www.extension.purdue.edu/extmedia/ID/ID-146-W.pdf