I would guess that you're seeing a combination of damage from leafrollers, plum curculio, a little bit of apple scab, and probably some other things. To grow fruit in Minnesota, you really do have to spray regularly in order to get any edible fruit at all. Even the organic producers spray here, they just use organic spray instead of synthetic. The absolute minimum is to use a combination "home fruit" spray starting in the spring after petal fall and then at 2-3 week intervals until the end of June.

Does it really matter? Is there that much difference in taste in pear varieties? Just eat them and enjoy. I think the common practice for most is to pick while green as soon as you see the first pear turn yellow on your tree. Then ripen them on the counter or put in the fridge first to hold them until you can eat or process them. For years I canned about 20 quarts a year from an unknown variety of pear tree that came with our first house by just setting the pears on the counter or on tables in the basement to ripen. I would pick them in batches every few days to avoid having them all ripen at once.I had never heard of putting them in the fridge first. Northwoodswis

If it were mine I wouldn't use anything other than a thorough leaf clean up after leaf drop since remaining leaves help to infect the tree the next season. Leaf spots are seldom detrimental other than from an aesthetic viewpoint. Bacterial blights can be ruinous (like fireblight on pear) but that isn't what your tree has. hortster

tell 'em how you really feel brandon.. lol ... is this ornamental [see brandons comments] ... or a fruit tree ... if a fruit tree .. there is a fruit forum.. and there are .. or used to be.. some specialists over there ... that i have never seen here ... otherwise i care not where you post.. good luck ken PS: we tree peeps do not like the ornamental pear ... see brandons comments .. over-hyped.. over-used.. under-performer ... it is definitely NOT a tree i would shorten my life for.. by using chemicals .... but i would shorten my life by powering up the chainsaw ... PPS: in my z5.. that also looks like frost/freeze damage.. which i would guess you dont get in z8 .. unless there are some facts to support such speculation ...