Q.Stink bugs on pear tree
The last couple of years my pear tree has been infested with stink bugs that ruin the fruit. They cause hard spots and misshapen pears that are unable to be used. This tree was labeled as a Bartlett pear when I bought it; however, the pears are like an Asian pear and have been very delicious in the past. The pears are not ready for picking usually before October.

I'm listing several links for you that will provide you more information.
https://extension.psu.edu/plants/gardening/fphg/stone/insect-and-mite-pests/plant-stink-bugs
https://www.gardeningknowhow.com/edible/fruits/pear/growing-pear-trees.htm
https://www.gardeningknowhow.com/edible/fruits/pear/how-to-grow-an-asian-pear-tree.htm
https://www.gardeningknowhow.com/edible/fruits/pear/fixing-pear-tree-problems.htm
https://www.gardeningknowhow.com/edible/fruits/pear/pear-tree-diseases.htm