Journal of Forestry
In reporting the damage to trees scorched lightly at the base by fire the average fire warden and even the technically trained forester is given to stating that little harm has been done providing the tree crowns remain green. Such a statement is far from being correct, failing as it does to take into account the aftermath of insect and fungus damage which invariably follows even the lightest of surface fires. In the case reported herein, over 50 per cent of the fire-scorched hardwoods showed signs of the presence of ambrosia-beetles, whose work, even if the trees continue to live, causes a serious reduction in quality of the wood of the most valuable part of the tree—the butt log.
Stickel, Pail W. 1934. Forest Fire Damage Studies in the Northeast--I. Bark-Beetles and Fire Damaged Hardwoods. Journal of Forestry 32(2): 701-703.