Some of the Principal Insect Enemies of Coniferous Forests in the United States
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Kinds of trees attacked. — So far as has been observed, this beetle attacks and kills the Bull Pine {Pi mix ponderosa) and the White Spruce {Picea canadensis), but shows a decided preference for the pine.
Fig. 31. — Work of the pine-destroying beetle of the Black Hills: a, a, a, entrance and basal chamber: h, ventilating holes in roof of gallery; r, termination of gallery (larval mines extending from each side of primary galleries) — all much reduced. (After author, in Bulletin No. 32, new seri...es, Division of Entomology.) 278 YEARBOOK OF THE DEPARTMENT OF AGRICULTURE.
Distribution of the species and extent of its depredations. — The beetle has been reported by Professor Gillette from central Colo- rado, which indicates that it may be found throughout the central Rocky Mountain region; but, so far as determined, it has not proved so destructive anywhere else as in the Black Hills Reserve, where in the past six years from 400 to 600 million feet of timber, according to various esti- mates, have been killed by it.
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You can find similar books in the "Read Also" column, or choose other free books by A D Andrew Delmar Hopkins to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Kinds of trees attacked. — So far as has been observed, this beetle attacks and kills the Bull Pine {Pi mix ponderosa) and the White Spruce {Picea canadensis), but shows a decided preference for the pine.
Fig. 31. — Work of the pine-destroying beetle of the Black Hills: a, a, a, entrance and basal chamber: h, ventilating holes in roof of gallery; r, termination of gallery (larval mines extending from each side of primary galleries) — all much reduced. (After author, in Bulletin No. 32, new seri...es, Division of Entomology.) 278 YEARBOOK OF THE DEPARTMENT OF AGRICULTURE.
Distribution of the species and extent of its depredations. — The beetle has been reported by Professor Gillette from central Colo- rado, which indicates that it may be found throughout the central Rocky Mountain region; but, so far as determined, it has not proved so destructive anywhere else as in the Black Hills Reserve, where in the past six years from 400 to 600 million feet of timber, according to various esti- mates, have been killed by it.
What to read after Some of the Principal Insect Enemies of Coniferous Forests in the United States?
You can find similar books in the "Read Also" column, or choose other free books by A D Andrew Delmar Hopkins to read onlineMoreLess
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