. A descriptive analysis of Montana's forest resources. Forests and forestry Montana Statistics; Timber Montana Statistics. Figure 16.—Thinned stand of 15-year-old lodgepole pine on the Gallatin National Forest. Complete removal of old stand was necessary to in- sure new stand would be free of dwarf mistletoe. all other disease agents. To control dwarf mistletoe, the infested stand must be clearcut and replaced by a new stand (fig. 16). As second-growth management becomes more widespread, losses to dwarf mistletoes will be sharply reduced, but other diseases will become far more prominent. Dis
. A descriptive analysis of Montana's forest resources. Forests and forestry Montana Statistics; Timber Montana Statistics. Figure 16.—Thinned stand of 15-year-old lodgepole pine on the Gallatin National Forest. Complete removal of old stand was necessary to in- sure new stand would be free of dwarf mistletoe. all other disease agents. To control dwarf mistletoe, the infested stand must be clearcut and replaced by a new stand (fig. 16). As second-growth management becomes more widespread, losses to dwarf mistletoes will be sharply reduced, but other diseases will become far more prominent. Diseases that begin in wounds or in fresh stumps, such as many heart and root rots, will become more prominent. The root-decay fungus Fomes annosus will undoubtedly be among the most important. In addition, many foliage and stem-canker diseases will become more damaging, especially where single-species management is practiced. The Role of Fire Nearly all of the wild forest stands in Montana were propagated or have been greatly modified by fires. Natural fires have occurred on forested lands on the average of about once every 150 years (Roe and others 1971). The commercially valuable trees and many other plant and animal species now native to the State are those that thrive under periodic fires. Ecological adaptations to fire found in timber species include: (1) sero- tiny of lodgepole pine cones—heat of fire opens closed cones and releases 29. 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 Schweitzer, Dennis L; Benson, Robert E. , joint author; McConnen, Richard J. , joint author; Intermountain Forest and Range Experiment Station (Ogden, Utah). Ogden, Utah : U. S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station
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