northwesterner wrote:
Compost it for a little while, let nature clobber whatever killed the tree. Chipping it up and piling it for a while is perfect.
Bradford pears have turned out not to be the great street trees people thought they were back in the 1980s when so many were planted, so a disease problem isn't a surprise. You could have circling/girdling roots going on also, not visible to you at this point. Many trees were simply plopped into the ground out of their black plastic pots and the roots weren't soaked and untwisted at all.
This is a good topic to call the Sunday morning radio show about - how to deal with replacing a street tree, when to replant, how to replant, etc. Good luck!
Thank you for the good advice, Northwesterner - I appreciate it!