Thanks scottfsmith! It seemed like spraying helped (and I found aphids on the tip leaves of both my pears). I am loathe to squish anything between my fingers but became so frustrated I finally did press the leaves together and rub in an effort to smash aphids without destroying the top growth. My top leaves on the Asian Pear died anyway but they seemed worse than my Turnbull Pear when I discovered the aphids. It is probably too early to tell if the problem is really resolving, but if not, I will take a pic and post it. I did definitely have a worm issue and aphid problems. I noticed a small scar on the Asian Pear trunk bark today about 18-24 inches above ground and hope its not fireblight. I have several animals in the back yard from time to time and they like to rub and get up against the trees also so I sort of thought they may have been the problem. The trunk is only about 1" diameter and animals could have damaged it although that seems a little high for my cats and small dog. Pics of fireblight have me worried. The sites recommend pruning 12 inches below any damage for fireblight, and since it's a young 6-8 ft tree, it seems crazy to cut it down nearly to the ground. I sure hope that is not what caused the bark damage I saw.

Yes, it's pear blister mite. I have it on both Asian and European pears. My Blake's Pride pear has gotten the worst of it. A fine forum contributor, Scott Smith, has advised me to use lime-sulphur spray right before bud break. I missed the opportunity, of course. Now that the leaves are full, too late to spray with lime-sulphur. With full leaves, I spray it with wettable sulfur. It helps but not as effective. I'll spray sulphur a few more times to help keep mites in check. I add sticker in the mix to help sulphur stay on leaves better. Spray underside of the leaves well, too. Next spring, I'll hit them with lime-sulphur at the right time. My tree just looks ugly but there is no real harm is done as far as I know.

The first picture didn't seem so bad. Just the effects of growing in the sun, rain and wind. Maybe a bit of fungus here, a bit of wind damage there, a hungry caterpillar maybe and a burnt leaf or two. The second picture is more serious. You have a deer. It (or they) is very likely to return again and again, especially as we go into summer and tender, green vegetation becomes scarcer. Expect return visits for all remaining green leaves.

Looks like damage from pear blister mites and perhaps aphids as well. These are not critical problems but could be pretty much eliminated with a good dormant spraying program. As to the fruit falling off, do you have a second pear tree around? Pears are not self-fertile and need a second one of a different type to cross pollinate. Fruit may well develop on a single tree but will abort without proper pollination.