Report On the Spruce Budworm
Report On the Spruce Budworm
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In our eReader you can find the full English version of the book. Read Report On the Spruce Budworm Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Report On the Spruce Budworm
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However, to completely kill the tree, it is necessary either that all or nearly all of the old leaves be also eaten, or that the destruction of the buds shall continue several seasons, or that the greatly weakened tree shall be attacked by other insects, such as borers which complete the destruction. Thus, but few trees are killed the first year of attack unless complete defoliation both of the new and old needles has resulted, but for the succeeding few years the results are cumulative, as eac...h succeeding crop of new leaves is nearly entirely destroyed, while in the meantime the old ones are being lost in the natural way. When, however, bark beetles and bark weevils attack trees already weakened by nearly complete defoliation, as has been recently reported by Swaine in Canada, they find but little resistance to overcome and the trees readily succumb.
In order to determine by personal observation the amount of damage done by the caterpillars, the writer spent a week in the forests of Piscataquis County, several days in the Rangeley Lake region, and another week in observation in the coast region from Bangor to Kittery Point.
What to read after Report On the Spruce Budworm?
You can find similar books in the "Read Also" column, or choose other free books by M W Maulsby Willett Blackman to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
However, to completely kill the tree, it is necessary either that all or nearly all of the old leaves be also eaten, or that the destruction of the buds shall continue several seasons, or that the greatly weakened tree shall be attacked by other insects, such as borers which complete the destruction. Thus, but few trees are killed the first year of attack unless complete defoliation both of the new and old needles has resulted, but for the succeeding few years the results are cumulative, as eac...h succeeding crop of new leaves is nearly entirely destroyed, while in the meantime the old ones are being lost in the natural way. When, however, bark beetles and bark weevils attack trees already weakened by nearly complete defoliation, as has been recently reported by Swaine in Canada, they find but little resistance to overcome and the trees readily succumb.
In order to determine by personal observation the amount of damage done by the caterpillars, the writer spent a week in the forests of Piscataquis County, several days in the Rangeley Lake region, and another week in observation in the coast region from Bangor to Kittery Point.
What to read after Report On the Spruce Budworm?
You can find similar books in the "Read Also" column, or choose other free books by M W Maulsby Willett Blackman to read onlineMoreLess
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