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There is a common misunderstanding of "frost cracks." In fact, these are never caused by frost or severe cold, but by decay fungi. Trees do develop frost cracks in extremely cold weather. I recall camping out in the Adirondacks at -55 F and listening to the rifle-shot sounds of trees popping all around. Careful inspection of frost-cracked trees shows that they were infected by decay fungi before they cracked, not after. Decay causes weakening in the wood which probably makes the trees susceptible to crackiing on cold weather. So frost cracking is really a symptom of infection by decay fungi.TO add to this, the rifle shots you hear are due to that! What makes the noise however is the same thing as shots on a lake. The tree where the rot is has moisture. WHen moisture freezes it expands, hense the the "Rifle Shots" Moisture sets in, freezes BANG Beech bark disease is rampant in the northeast. Beech bark disease is caused by a scale insect and a fungus. Trees with weakened or dead bark become infested with insects and infected with decay. Trees with beech bark disease often have rough bark, oddly shaped wounds and splits at the base. It is possible that the trees you are seeing have this disease and the secondary decay that comes with the disease.
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