. Bulletin. Forests and forestry -- United States. 74 A PKIMER OF ravages attain enormous proportions. Thus a worm, which afterwards develops into a sawfly, has since 1882 killed nearly every full-grown Larch in the Adirondacks by eating away the leaves. (See fig. G7.) Even the small and vigorous Larches do not escape altogether from, these attacks. Conifers, such as the Larch and Spruce, are much more likely to suffer from the attacks of insects than broadleaf trees. About the year 1S7G small bark beetles becan to kill the mature Spruce trees in the Adirondacks, and ten years later
. Bulletin. Forests and forestry -- United States. 74 A PKIMER OF ravages attain enormous proportions. Thus a worm, which afterwards develops into a sawfly, has since 1882 killed nearly every full-grown Larch in the Adirondacks by eating away the leaves. (See fig. G7.) Even the small and vigorous Larches do not escape altogether from, these attacks. Conifers, such as the Larch and Spruce, are much more likely to suffer from the attacks of insects than broadleaf trees. About the year 1S7G small bark beetles becan to kill the mature Spruce trees in the Adirondacks, and ten years later, when the worst of the attack was l^ast, the forest was practi- cally deprived of all its largest Spruces. This pest is still at work in northern New Hampshire and in Maine. FOREST FUNGI. Fungi attack the forest in many ways. Some kill the roots of trees, some grow ui)ward from the ground into the trees and change the sound wood of the trunks to a useless rotten mass, and the minute spores (or seeds) of others float through the air and come in contact with every external i^art of the tree above ground. (See fig. (38.) Wherever the wood is exposed there is danger that spores will find lodgment and breed disease. This Fig. 68.—Rotting wood from an old Eed Fir stub. The young Hemlock to the right began life on the bark of the Fir. Olympic Forest Keserve, Wash- 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 United States. Division of Forestry. Washington : G. P. O.
Size: 1537px × 1625px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookpublisherwashingtongpo, booksubjectforestsandforestryunited
