The two-lined chestnut borer attacks weakened oaks–in our case, burr oaks. It is one effect of climate change in Minnesota. The winters aren’t cold enough to kill the beetles and the springs are too wet. Of course, this can lead to oak wilt, the infamous destroyer of oaks, but this has not happened on the farm yet. It’s sad to see so many of these magnificent trees dying.
stevenalm.com 
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