What causes the pits/knots in my pears that makes them inedible? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension

Question: Last year many of our pear trees (we have about 10 varieties) had fruits with pits or knots in them making lots of the fruits nearly inedible. What causes this, and is there anything I can do to correct it? I always prune my trees in the same way, and also thin the fruitlets read more