Fruits and Nuts: Pears Are "Cracking"! HELP!, 1 by Echo4u

Echo4u wrote:
My old-fashioned pear tree (probably a Bartlett) put on a lot of fruit this year...about 50% of it looks great...and the other 50% looks like the photo. The cracks are not wet or oozing. They are dry to the touch...the pear is still hard, and there is no odor of rotting fruit. No possible culprits are visible and I have sprayed on schedule. I'm afraid that these damaged pears are going to attract the recently emerged Junebugs and a host of others. Can anyone help me with identification and the small hope of protecting the remainder of "healthy" pears? Thanks for any advice you can offer.
Laura