I have attached a photo of pear tree leaves from a tree in our yard. The leaves have orange and black spots with the occasional holes. Can you identify what the pear tree may be affected by?
Unfortunately, I believe that your pear tree is infected with Pear trellis rust disease. Here is a link to some detailed information on this subject that should give you some insight into this disease: https://www.torontomastergardeners.ca/askagardener/pear-trellis-rust-2/