Why are my Asian pears cracking?
I have a 'Shinko' Asian pear tree on Betulifolia rootstock. Last year I lost all the pears to cracking. this year, just a few have cracked, but I'm worried the rest will follow. The pears look fine otherwise. I have a Seckel European pear that gets scab, which makes the fruit crack, but those fruit are covered with the fungus. I don't see any such thing on the Asian pears. Rain has been good this year, so I don't think it's related to drought stress. Any ideas?