. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Photo by James Kay. HOW A LOG TELLS ITS EARLY HISTORY This Western Larch is 335 years old, and is 33 inches in diameter. At fifteen years of age it was damaged by fire and again at 150 ycJirs. The scars are plainly visible. short branches of mycelium which im- mediately begin the decay of the wood at the point of infection, and soon a large growth of the mycelium occurs, which spreads rapidly. Conditions in the forest are ideal for the development of these fungi. Large quantities of windfall and branches are lying around;
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. Photo by James Kay. HOW A LOG TELLS ITS EARLY HISTORY This Western Larch is 335 years old, and is 33 inches in diameter. At fifteen years of age it was damaged by fire and again at 150 ycJirs. The scars are plainly visible. short branches of mycelium which im- mediately begin the decay of the wood at the point of infection, and soon a large growth of the mycelium occurs, which spreads rapidly. Conditions in the forest are ideal for the development of these fungi. Large quantities of windfall and branches are lying around; the logger leaves tops,. Photo by James Kay. How the ever-ready fungus falls the weaker, ed tree to complete the work of destrucdon by inner rot. Tliis Western Larch has been darnjiged by fire and the Brown Heartwood Rot has qu'ckiy formed. Photo taken at Yahk, culls and slash everywhere. These form an ideal nursery ground for the perpetu- ation and spread of wood destroying fungi. It has be^i stated that by eliminating the factor oi decay in forms of timber now in use, the saving in the annual cut for replacement would amount in the United States and Canada to nearly one hundred million dollars. Stated in an- other way we would need to produce less than half the timber now used, of the factor of decay were eliminated. "In the forest under the present system of ex- ploitation in this country the losses from wood-rot reduce immensely the yield of ; A simple method of disease control in the forest is burning the slash and all diseased trees at the time of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Canadian Forestry Association. [Ottawa] : Canadian Forestry Association
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