Insect Enemies of the Spruce in the Northeast: A Popular Account of Results of Special Investigations, with Recommendations for Preventing Losses (1901)
Insect Enemies of the Spruce in the Northeast: A Popular Account of Results of Special Investigations, with Recommendations for Preventing Losses (1901)
Excerpt from Insect Enemies of the Spruce in the Northeast: A Popular Account of Results of Special Investigations, With Recommendations for Preventing Losses These observations would also indicate that activity ceases in the fall by about the middle of October, when all stages of the insect may occur in the bark of infested trees where they, with the probable exceptions of the eggs and pupae, remain until the first week in June. Activity then commences, the mature larvae change to pupae, and by the middle of June those ...
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Excerpt from Insect Enemies of the Spruce in the Northeast: A Popular Account of Results of Special Investigations, With Recommendations for Preventing Losses These observations would also indicate that activity ceases in the fall by about the middle of October, when all stages of the insect may occur in the bark of infested trees where they, with the probable exceptions of the eggs and pupae, remain until the first week in June. Activity then commences, the mature larvae change to pupae, and by the middle of June those that pass the winter in the adult stage emerge and commence to excavate galleries and deposit eggs. The adults from the hibernating larvae of different stages, develop and continue to emerge possibly until the last of August. Therefore the eggs deposited by the late-developing beetles produce larvae which do not complete their development until July or August of the next year. Thus, the period of development may vary from about seventy days to about twelve months, but all broods from eggs to matured and emerging adults remain in the bark about twelve months, of which they are dormant about seven and one-half and active four and one half. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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