Stig, The beech is the ultimate understory tree when it is young and in an old climax forest the thin bark is very well protected from exposure. Willie, Are the trees that are affected in your area those that have traditionally thin, smooth barked when young? Are they those that are...
I believe Alex Shigo contended that the "sunscalding" was more a result of interrupted moisture flow due to flush cuts or root injuries, and that the sun (wide temperature swings due to solar warming followed by a sudden shadow or sunset in our more temperate regions) was merely a trigger...
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