pear tree buds are mottled
Our pear tree is just coming into bud; however, the buds unfortunately are mottled brown.
Did you have a cold spell?
My own Pear tree blossoms had this same description from last year, as we had a deep cold stretch in mid spring.
Weather is certainly something no gardener can control, so my best advice is 'wait and see'.
Pears are generally pretty insect free, but always a good to carefully inspect.
Here is a link about the care of Pear Trees.