Q.What is this n How to Rid of it?
Hello, we just moved into our house n in back yard we found out we have this pear tree. Our backyard is surrounded by 6 neighbors n 4 of them own dogs. The limbs were hanging low touching the ground but we soon cut them to make look like a tree again. We moved in in June 2018 n I noticed most leaves had these yellow splotches n sum branches had the lil balls on them…well now wen I looked at them up close…there are these spiky things on leaves now but most of the leaves have these yellow blothes wit spikes n pears are growing into shape of pears too. Don’t know what this is or what to do…cuz wuld be nice to be able to eat these pears in future…

This looks like pear trellis rust disease which is similar to "apple-cedar rust". Here are 2 articles for you. http://www.ladybug.uconn.edu/FactSheets/pear-trellis-rust.php#
http://blogs.oregonstate.edu/mgmetro/2017/10/03/pear-trellis-rust-new-disease/