You just might have fireblight. It looks like the branch ends have burned off - leaves and stems.
If that's what you have, the way I fix it is to cut off the 'burnt' sections back into fresh wood and dip the cutters in straight vinegar after each cut. Then I spray the whole tree down with a 40% white vinegar to 60% water solution. The vinegar kills off the spores very quickly. Bin the damaged cuttings.