Re: Pear Leaf Blister Mites
I typed a long post and waited to long to submit it so it got biffed.
I don't think apples are susceptible to pear blister mites. My sister's pear tree had them and never saw it on her several apples.
I pruned most/all off when I topworked the tree and they haven't been a problem since I did that a few years ago (don't recall if there are any or just much less). Even when she had them it didn't seem to affect the fruit much, it was mostly the leaves.
Picking the leaves in Sept sounds like a good idea if the tree isn't too big.