Answer: Unfortunately based on your description I am unable to tell you specifically what is happening to your pear tree. This type of symptom can be caused by a wide variety of reasons ranging from for example overwatering or a poorly drained site, overfertilizing, frost damage, poor rooting, or a disease or fungal infection. I would suggest you work with your county extension and/or professionally trained and certified nurseryman (since it is a new tree you might want to check back with your retailer) to determine what is causing the problem and then based on that, decide how best to proceed. I hope it is nothing too serious.
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