Thanks for the reply to my post about Asian pears. One year as an experiment I didn't hand pollinate them and got almost no fruit set, but it could have been just the year. The honeybees that come to my yard will pollinate my nectarines and apricots, but like you and I both noticed, we have never seen them on an Asian pear. They seem to prefer the yellow flowers on the oxalis weeds to any fruit tree. I don't know if I should leave those pretty weeds as they attract bees or pull them out as the bees seem to prefer them. I never see any bees on my citrus blossoms either, but they set a lot of fruit anyway. The bees also like my lavender, and the hummingbirds like my aloe vera flowers and four o'clocks. I have never seen a honeybee on my tomatoes, but some big black bees are attracted to them.

The sugar content in the nectar of pears is comparatively lower than most fruit bloom. Combine that with traditionally low temperatures at pear fruit bloom. (Honey bees forage at 57 degrees and above) Also if there is an abundance of a preferred forage (ie dandelions) older field bees will go there instead. The honeybee is singular in foraging, if it is working pears, it will work only pears.